Identify the correct and explain the incorrect statement.

The term used for various steps in a food chain is

1)    Various steps in the food chain represent the trophic level.

2)     The food chain is a linear sequence of organisms that starts from producer organisms, continues through consumer organisms, and ends with decomposer species.

3)    A trophic level is an organism's specific position in the food chain based on its food source.

4)    For example, plants (producers) occupy the first trophic level. Herbivores occupy the second trophic level, and carnivores occupy the third trophic level.

5)    The amount of energy decreases at successive trophic levels.

Hence option (b) trophic level is correct.

Explanation of the incorrect options: 

Option (a):The Food web is the natural interconnection of food chains. 

Option (c): The ecosystem is a biological community where organisms interact with each other and the physical environment. 

Option (d): Biomagnification is the accumulation of certain chemical substances in the body of organisms. Its concentration builds up on organisms at different food chain trophic levels. Final answer: Various steps in a food chain represent a trophic level.