Net primary productivity $\left(\mathrm{NPP}\right)$ in an ecosystem is

Which of the following includes ecosystem services?

A. Purification of air and water by forests.

B. Forests mitigate drought and flood.

C. Forests act as a storehouse of carbon.

D. Forests influence the hydrological cycle.

If $20 \mathrm{J}$ of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?

Plant $\to$ Mice $\to$ Snake $\to$ Peacock

Given figure represents two food chains (X and Y) linked together to form a food web.

Identify the types of food chains X and Y and the organism A that interconnects these food chains