Question

I need help with c , d and f plz.

Answer 1

D is the diving beetle and the water fleas
F is the insect and slug populations may increase but the fox and heron population would have to prey on the other organisms, the slug, small fish and perch populations would decrease.

Answer 2

C. A six trophic level food chain from the given food web would be -

The land plants → insects → diving beetle → small fish → Perch → Heron

D. The animals that are eaten by the small fish are diving beetles and water fleas according to the given food web.

F. Sudden eliminated of the frogs from this food web there will be an increase in the population of insects (mostly), water fleas and diving beetles as they are eaten by frog however water fleas and diving beetles still have other predators to balance the food web. There will be a shift of dependency of food for fox and the heron and completely on slugs and small fishes, perch respectively.