Starting from the process of nitrogen fixation, trace the flow of nitrogen by numbering the steps that follow.

: nitrification occurs to convert ammonium into nitrates. denitrification occurs to release nitrogen back to the atmosphere.

: nitrogen flows through the food chain as a primary consumer eats the plant, and a secondary consumer eats the primary consumer.

: plants absorb nitrates and conduct assimilation.

: a consumer releases waste and ammonification occurs to convert ammonia into nitrates and ammonium

Nitrogen cycle is a biogeochemical cycle that involves the circulation and conversion of nitrogen into different forms among the living and non-living components of the environment. The following are the steps in nitrogen fixation.

1 Nitrogen fixation.

2 Plants absorb nitrates and conduct assimilation.

3 Nitrogen flows through the food chain as a primary consumer eats the plant, and a secondary consumer eats the primary consumer.

4 A consumer releases waste and ammonification occurs to convert ammonia into nitrates and ammonium.

5 Nitrification occurs to convert ammonium into nitrates. Denitrification occurs to release nitrogen back to the atmosphere.

answer: the answer is b