Question

Why there is progressive decline in amount of energy at each trophic level.

Answer 1

due to 10percent law....as this law means 10percent of energy loses from moving one trophic level to another trophic level

for example...

Grass (2000J) _____ deer (200J) _____lion(20J)


i hope now it is clear to you.

Answer 2

There is a progressive decline in the amount of energy at each tropical levels because the energy level decreased down by 10% law