The ultimate energy source of the ecosystem is

Which of the food chains directly depends on solar radiation?

Energy enters into the ecosystem through

How does energy flow in an ecosystem?

Assertion : $A$ network of food chains existing together in an ecosystem is known as food web.
Reason : An animal like kite cannot be a part of a food web.

If $20 \, J$ of energy is trapped at the producer level,then how much energy will be available to the peacock in the following food chain (in $, J$)?
Plant $\to$ Rat $\to$ Snake $\to$ Peacock