Which of the following is an ecological energy source?

$Y-$shaped energy flow model was given by

The transfer of energy from one trophic level to another follows the second law of thermodynamics. The efficiency of energy transfer from herbivores to carnivores is: (in $\%$)

Cybernetics is associated with

The trophic level of a food chain having the greatest amount of energy is

The first link in any food chain is always a green plant because