If organisms like dolphins have to be protected in a river area, which conservation point is most necessary?

Protection of water quality, flow and food chain

River dolphins depend on a functioning river ecosystem, not merely on the presence of water. They need suitable water quality, adequate flow, connected habitat, and enough food organisms. Pollution can injure or poison them, altered flow can disturb their habitat, and damage to the food chain can reduce available prey. Conservation must therefore address these connected conditions.

Option A is correct because it protects water quality, river flow, and the food chain together. Decorating the bank alone cannot secure the animals’ habitat. Deforestation and dumping waste usually worsen river conditions. Treating a river as a living habitat leads to a more complete and effective conservation plan.

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