Answer the following:

In any food chain, trophic level-1 is occupied by green plants. Give reason.

In any food chain trophic level-1 is occupied by green plants. This is because all living beings need food energy and green plants are the only producers. They make their own food and are not dependent on any other organism for food. Animals cannot make their own food and depend on plants for food energy to survive. For this reason, green plants occupy the first trophic level in every food chain.