Which groups are organisms divided into based on their primary ecological role?

An ecosystem,such as an aquarium,is self-sustaining if it involves the interaction between organisms,a flow of energy,and the presence of

Choose the incorrect option for the cost distribution of ecosystem services.

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.

The sun is the source of both....

Which of the following is a functional aspect of an ecosystem?