resource interdependence

The direct answer is A: crops grow on land and water provides irrigation. Food production needs suitable soil, sunlight, seeds, labour, and sufficient water. First, land gives plants a place to grow and supplies soil nutrients. Next, water helps seeds germinate, carries nutrients, and supports plant growth. If land is available but water is absent, crops may fail; if water exists without usable land, ordinary field farming cannot take place. A correctly shows this interdependence. B is wrong because water, when properly managed, supports food instead of destroying all food. C is wrong because crops grow on land, so land is essential. D is wrong because much food is produced through agriculture, not only in factories. Exam cue: connect food production with both land and water.

Forests help protect soil in several ways. Tree roots hold soil particles together, while fallen leaves and plant material cover the ground and reduce the force of rain and wind. When forests are cleared, this protection becomes weaker. Heavy rain can wash away the fertile topsoil, and wind can carry loose soil away. This process is called soil erosion. The loss of trees can therefore reduce soil fertility, increase runoff, and make farming more difficult in the long term.

Option A is correct because decreasing forest cover can increase soil erosion. Option B is not supported because soil does not automatically increase. Option C is scientifically incorrect: soil does not simply turn into protective stone. Option D is also wrong because soil remains essential for agriculture. The connection is clear: fewer roots and less ground cover mean less protection, so erosion may rise.

Transport carries farm produce to market. Exam tip: write transport between production and distribution.

The direct answer is A: energy runs the use and processing of many resources. Energy is the capacity to do work. In farming, it operates pumps, tractors, and harvesters. In industry, it powers machines that process raw materials into useful products. In transport, it moves people and goods, linking mines, farms, factories, and markets. Thus energy connects many resources and activities. A is correct because it explains this practical linking role. B is wrong because energy does not make resources invisible. C is wrong because energy is not meant to stop all water; it may help pump or treat water. D is wrong because forests cannot be turned into minerals by energy. Exam cue: energy helps extract, process, move, and use resources.

Land is useful but becomes more productive with other resources. Exam tip: understand single resource and combined use.

Minerals are raw materials that need processing. Exam tip: identify the chain from mineral to industry.

Water conservation stores and uses water for irrigation and helps retain essential moisture in the soil. This supports crop growth and improves land productivity. Keeping land dry reduces soil moisture, so option B is incorrect. Exam tip: link water conservation with irrigation, soil moisture, and agricultural productivity.

Forests are valuable because they provide many goods and ecological services, not only timber. Tree roots hold soil and reduce erosion caused by water and wind. Forests also provide habitats for plants, animals and microorganisms, thereby supporting biodiversity. They influence the water cycle, help store carbon and supply products such as fruits, fibres, medicines and fuel in many regions. These functions make forests important for both people and the natural environment.

Option A is correct because soil protection and biodiversity are major benefits of forest resources. Petroleum mines, sea salt and iron rails are not ordinary ecological services provided by forests. A forest may support livelihoods through several products, but its environmental value is equally important. Sustainable use and conservation are therefore necessary so that forests continue to protect land, shelter species and support human communities over time.

Natural and human-made resources often work together to meet human needs. River water is a natural resource, while a canal is a structure built by people. A canal can carry, store, or distribute river water to fields, towns, or other locations. In this way, the usefulness of natural water is increased through human planning, construction, and technology. This example shows resource interdependence: nature provides the material or energy, and people create systems to use it more effectively.

Option A is correct because it combines river water, a natural resource, with a canal, a human-made resource. The moon and a star in option B are both natural objects. Sand and sunlight in C, and cloud and air in D, are also natural resources and do not include a human-made facility. The defining clue is the presence of a constructed canal, so A is the correct choice.

Humans machines and energy work together in industries. Exam tip: understand factors of production together.

In overgrazing, animals consume grasses and other small plants faster than they can regrow. This reduces vegetation cover and leaves the soil vulnerable to erosion by rain and wind. Option B describes the usual benefit of adequate plant cover, not the effect of excessive grazing. Exam tip: link overgrazing with land degradation and soil erosion.

A map can show the locations of mineral, agricultural, or energy resources along with roads, railways, ports, and other transport links. These links show how resource-rich regions supply resources to other regions and receive goods or services in return; this is resource interdependence. Looking at resources in only one state does not show relationships between regions. Exam tip: study transport and trade links along with resource distribution on a map.

Irrigation needs water source and human-made arrangement. Exam tip: treat a project as combined resource use.

Natural resources are only a starting point for development. A region may possess minerals, forests, fertile land, or water, but these resources become useful only when people can identify, process, transport, and sell them. This requires suitable technology, roads and other transport, investment, skilled workers, and institutions that can organize production. Without these supporting conditions, resources may remain unused or bring little benefit.

Option A is correct because it identifies the gap between having a resource and having the capacity to use it. Option B is an extreme and false claim: resources do not always stop development. Option C ignores the essential role of human knowledge and work, while option D wrongly assumes that resources can reach markets without transport or organization. Thus availability alone cannot guarantee development.

Forests provide food, shelter and breeding spaces for diverse plants, animals, birds, insects and microorganisms. Thus, forests are major habitats for biodiversity, while diverse organisms also help maintain the balance of forest ecosystems. Option B is incorrect because forests are not merely sources of timber. Exam tip: remember the link as ‘habitat and ecosystem balance’.

Polluted water can harm aquatic life and fishing. Exam tip: write resource effects of pollution.

Market links resource-based goods with consumers. Exam tip: understand the chain of production market consumption.

Land use determines how much rainwater reaches the ground, flows across the surface, or enters the soil. Vegetation and open soil usually allow more infiltration, while compacted ground, roads and buildings can increase surface runoff and reduce infiltration. Farming, urbanisation, deforestation and changes in drainage channels may therefore alter the speed, direction and volume of water movement. The result depends on local conditions.

Option A is correct because both runoff and infiltration can change when land use changes. Water does not always disappear, rivers do not always close, and rainfall itself does not stop merely because land is used differently. The question tests the link between land cover and drainage, not an absolute prediction for every place or season.

River valley projects can help irrigation power and water management. Exam tip: note the word multipurpose.

The direct answer is A: conservation is necessary to meet the needs of future generations. Resources such as water, soil, forests, minerals, and energy are limited or can be damaged by overuse. Reason step by step: people need resources today; careless use can reduce quantity or quality; future people will also need resources; therefore planned use, saving, recycling, and protection are necessary. Option A is correct because it expresses intergenerational responsibility. Option B is wrong because conservation does not mean hiding resources; it means using and managing them wisely. Option C is wrong because conservation does not require stopping all production forever. Sustainable production can continue while reducing waste and damage. Option D is wrong because conservation does not end present needs; it balances present use with future availability. The key idea is sustainable development: use resources carefully so both present and future generations can live well. Memory cue: use today, protect for tomorrow.

Agriculture and industry are closely connected through raw materials and finished products. Cotton is grown by farmers as an agricultural crop. Textile industries use cotton fibre to make yarn, cloth, and many other products. The industry therefore depends on farming for an important input, while farmers may receive demand and income from the industrial market. Processing changes the raw material into a more useful and valuable product, showing how primary activities support secondary activities.

Option A is correct because cotton farming supplies the raw material needed by textile factories. Option B is wrong because cotton is directly related to textiles. Option C is wrong because cotton is a plant-based agricultural product, not a mineral. Option D is wrong because farming does not only produce electricity. The connection between the crop and the factory clearly makes A the correct answer.

Some industries depend on both energy and raw material. Exam tip: understand industrial role of energy resources.

Importance of a resource changes with place and need. Exam tip: treat utility as the identity of a resource.

Educated human resources can plan better. Exam tip: link education with quality of human resource.

Direct answer: Option A, raw material, energy, labour and transport. A factory changes inputs into goods, so it needs a connected resource chain. First, raw material is the substance to be processed. Second, energy runs machines and supports production. Third, labour operates, supervises and maintains work. Fourth, transport brings inputs to the factory and carries finished goods to markets. Option A contains all these necessary groups. Option B, moonlight and dust, cannot normally provide the material, power, workers and transport required for industrial production. Option C, rain and rainbow, may be natural phenomena but are not a complete industrial resource system. Option D, a sea shell alone is only one possible material and gives no energy, labour or transport. The word “group” is important: a factory depends on interdependent resources, not one isolated item. Memory cue: factory chain = material, power, people, movement.