The dynamic aspect of an ecosystem is:

Read the following statements carefully and answer the question:
$(1)$ Pyramids of number and biomass can be upright or inverted in an ecosystem.
$(2)$ Phosphorus and sulfur are sedimentary cycles.
$(3)$ The largest reservoir of carbon on Earth is found in the oceans.
$(4)$ The structural and functional unit of ecology is the ecosystem.
Which of the above statements are correct?

Give scientific reasons: Coral reefs are not found in the regions from West Bengal to Andhra Pradesh,but are found in Tamil Nadu and on the east coast of India.

Which of the following statements is true for an ecosystem?

Identify the correct sequence of development of a stable community (climax community) starting from a new area (primary succession).

Identify $Z$ in the given figure representing the carbon cycle.