Role of Rivers

Rivers drain rainwater and melted snow from the land. In exams remember a river as the main channel of water flow.

River water is used for irrigating fields. For exams remember agriculture and river water together.

Rivers deposit the soil they carry in the plains. In exams connect alluvial soil with river deposition.

Settlements grow near rivers due to water and fertile land. In exams link river valleys with human settlement.

Rivers are important sources of freshwater in many areas. In exams write water supply as a major use of rivers.

A river cuts the land while flowing and forms a valley. In exams connect river valley with erosion.

Deep and wide rivers help in navigation. In exams consider water transport as an economic use of rivers.

During floods a river deposits fertile sediments on its banks. In exams link flood plains with deposition.

Many aquatic organisms live in rivers which supports fishing. In exams write it as a livelihood use of rivers.

Rivers help soil formation through erosion and deposition. In exams remember rock breaking and sediment deposition.

Rivers support many economic activities. In exams give four examples while writing uses of rivers.

A river may form a delta by depositing sediments near its mouth. In exams remember delta as a result of river deposition.

Rivers carry rainwater from land to seas or lakes. In exams treat rivers as the flowing link of the water cycle.

Rivers erode land carry sediments and deposit them. In exams treat these three as the main actions of rivers.

Alluvial soil brought by rivers is useful for agriculture. In exams write alluvial deposition as the reason for fertile river banks.

Near rivers water transport trade and water supply are easier. In exams remember the role of rivers in city development.

Rivers bring alluvial soil and make plains fertile. In exams link the Ganga plain with alluvial soil.

River water is useful for domestic needs. In exams write domestic and agricultural uses of river water separately.

Irrigation is the planned supply of water to agricultural land when rainfall is insufficient, irregular, or unavailable at the required time. Crops need water for processes such as germination, growth, and formation of flowers or grains. River water, when properly managed and suitable for use, can be carried through canals, channels, pumps, or other systems to fields. This helps farmers maintain crop growth and may support cultivation beyond the rainy season. Irrigation does not guarantee success by itself, but it directly supports agricultural production.

Option A is correct because supplying river water to fields helps crops receive the moisture they need. The other choices contradict the purpose of irrigation. Water does not necessarily disappear, fields do not always become barren, and irrigation cannot close the source of a river. The benefit described is general and does not claim that every irrigation system is perfect or risk-free. It simply identifies the direct agricultural advantage: a more dependable water supply can assist crop production.

Rivers cut land and deposit sediments. In exams treat rivers as landform-building agents.