How is nitrogen returned to the atmosphere during the nitrogen cycle?

a.
it is returned to the atmosphere in a process called nitrogen fixation.
b.
it is returned to the atmosphere through denitrification.
c.
it is returned to the atmosphere through cellular respiration.
d.
it is returned to the atmosphere through evapotranspiration.

B

Explanation:

Just took the quiz, it's B for sure.

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

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