The best source of energy in the environment is

What percentage of energy can be captured by the organisms of the next trophic level (in $\%$)?

The main source of energy in an ecosystem is .........

Energy flow in an ecosystem is.......

During the transformation of energy, in what form is energy lost?

Assertion: Ecosystems are not exempt from the second law of thermodynamics.
Reason: In a food chain,energy flow is bidirectional.