$Y-$shaped energy flow model was given by

Suppose $2000 \; J$ of solar energy is incident on green vegetation. On the basis of the $10 \; \%$ law of Lindeman,identify $A, B$ and $C$ as shown in the figure.

Assertion $A$: The amount of free energy in a system gradually decreases.
Reason $R$: During any transformation of energy,some amount of energy is lost in the form of heat.
Which option is correct for Assertion $A$ and Reason $R$?

Which of the following has maximum energy at trophic level in this food chain $Grass \rightarrow Rabbit \rightarrow Wolf \rightarrow Lion$?

Give an account of energy flow in an ecosystem.

Given below are two statements.
Statement $I$ - The amount of energy available in an ecosystem increases at each successive trophic level.
Statement $II$ - Transfer of energy from one trophic level to the other follows $10\%$ law.
In the light of above statements, select the correct option given below: