Question

what is the primary source of ecosystem? can you suggest the reason behind decrease in the energy at each level?​

Answer 1

Answer:

light (sun light) is the primary source of ecosystem.

some amount of energy produced in the tropic level is used by the organisms of the same tropic level. so that some energy is lost while passing through the subsequent tropic levels

Answer 2

Answer:

The primary source of eco system is light.