Question

Using a suitable food chain, show how the cutting down of a large part of a forest can disturb the balance among the organisms living there.

A farmer sprays poison to kill all the frogs in his paddy field because they make noise. Using the food chain Paddy → Grasshopper → Frog → Snake, explain how this would affect (a) the paddy crop and (b) the snakes.

Meera visited the Sundarbans with her school. Her guide showed her an area where mangrove leaves fall into the water. Tiny crabs and shrimps feed on the decaying leaves, small fish eat the shrimps, larger fish eat the small fish, and the Bengal tiger sometimes catches large fish. The guide also pointed out that wherever the mangroves had been cut, crab and fish catches of local fishermen had fallen.