Which of the following is not true regarding an ecosystem?

Consider the following statements about the carbon cycle and choose how many statements are correct?
$(a)$ The atmosphere contains $71\;\%$ of the total global carbon.
$(b)$ Decomposers contribute substantially to the $CO_2$ pool by processing waste materials and dead organic matter from land or oceans.
$(c)$ $4 \times 10^{13}\; kg$ of carbon is fixed through photosynthesis annually.
$(d)$ There is no respiratory input into the atmosphere.
$(e)$ Carbon constitutes $49\;\%$ of the dry weight of organisms.

What is the percentage of $\text{PAR}$ in the incident solar radiations?

The stable plant community that is formed during succession is called .....

What is the average price tag for ecosystem services determined by researchers?

Select the correct option regarding trophic levels in an ecosystem.