Question

the first trophic level in food chain is always in green plant why

Answer 1

Because they are producers. They produce food for all other organisms and so they are always on first trophic level of food chain. Food chain starts from them. If they won't produce food rest all organisms won't survive.I hope this helps you.

Answer 2

Answer:

This is because producers absorb sunlight and fix it into food chain. This energy is transferred to organisms.