Which of the following is included in edaphic factors?

In any food chain,an average of $10 \%$ of the food eaten is turned into the body mass of an organism and made available for the next level of consumers.

Pesticides like $DDT$ which are sprayed to kill pests on crops are found to be present in the soil,groundwater,water bodies etc. Explain how do they reach these places.

What will happen if all the deers are removed in the given food chain?
Plants $\rightarrow$ Deers $\rightarrow$ Tigers

Give one protective function of forests.

Draw a food chain which operates in a forest ecosystem.