Mr. $X$ is eating curd/yoghurt. For this food intake in a food chain,he should be considered as occupying:

Snakes are included under which category in a food chain?

If all the plants of the world die,all the animals will also die due to the shortage of:

Find an incorrect statement for $DFC$ (Detritus Food Chain).

Which cycle is represented by the given figure?

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?