What is this? Please answer with an explanation

It's C.

Explanation:

The process of nitrification is that is a process that converts ammonia to nitrite and nitrite to nitrate. It is an important step in the global nitrogen cycle. It is exclusively carried out by prokaryotes, which is a group of organisms called bacteria.

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false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: