Why may only planting trees not be enough in habitat restoration?

Because water sources grasslands native species and animal needs must also be considered

A habitat is more than a collection of trees. It is a complete living place that includes food, water, shelter, suitable soil, space, and conditions needed by different organisms. Some species need grasslands, wetlands, shrubs, or open ground rather than dense forest. Planting trees in the wrong place can reduce existing grassland or fail to provide the food and shelter that native animals require. Restoration must therefore be based on the original ecosystem and local needs.

Option A is correct because water sources, grasslands, native species, and animal requirements all matter. The other choices are absolute or meaningless: planting trees is not always wrong, animals do have habitat needs, and restoration is directly connected with nature. A successful plan restores the whole ecological system, not merely the number of trees.

This is a Class 9 Geography question. Chapter: Natural Vegetation and Wildlife. Topic: Conservation.