Question

Organisms of a higher trophic level which feed on several types of organisms
belonging to a lower trophic level constitute the
a. Ecosystem
b. Ecological pyramid
c. Food web
d. Food chain​

Answer 1

(a) Organisms of a higher trophic level feeding on several types of organisms belongingto a lower trophic level constitute the food web. A series of organisms through which food energy flows in an ecosystem is called a food chain.

Answer 2

(b)$\large\mathcal\red{Ecological\:\: pyramids}$

$\large\bf\orange{Explanation☞}$

A series of organisms through which food energy flows in an ecosystem is called a food chain. An ecosystem consists of all the living beings of an area and non-living components of their environment. The graphic summary of the trophic structure and energy transfer in an ecosystem is called ecological pyramids.