A catastrophic event that causes many different species to disappear in a short period of time is known as a

A. macroevolution.
B. punctuated equilibrium.
C. mass extinction.
D. background extinction.

C

Explanation: This is the definition of mass extinction.

Extinction

Explanation:

Extinction is the disappearance of all members of a species. A species is considered extinct from the moment the last individual dies. In the case of species that reproduce sexually, extinction is generally unavoidable when only one individual of the species remains, or only individuals of the same sex, since there is no way they can reproduce to give continuity to their species.

the answer to your question is slate

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.