It is difficult to determine a definition for life that is suitable for all situations. instead of defining life, biologists have decided to
describe the characteristics of life
determine if something is living or non-living based on its complexity
qualify life based on whether something can move or not
determine something is living if it responds to outside stimuli

The Correct Answer is (A) Describe the characteristics of life

Explanation:

The correct answer is the first one: biologists describe the characteristics of life rather than providing a definition. Some of the characteristics include:

growth

reproduction

metabolism (using and transforming energy)

organization (into multiple cells or within the cell)

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

i believe it would be c: tons.