Question

what is only 10% of energy made available to next trophic level when green plants are eaten by herbivorous​

Answer 1

because mainly most of the energy get use by that organisms and some energy is also exosted

Answer 2

Answer Plants capture solar energy and convert into chemical energy a large part of it is consumed by plant for various endo activities and left 10percent is consumed by herbivores . They eat green plants , obtain energy and again 10 percent left is consumed when a herbivore is eaten by a primary carnivore. And thus process continue