What Is the Relationship Between the Processes of Nitrogen Fixation

Multiple Choice

What is the relationship between the processes of nitrogen fixation and denitrification?

A) Both processes move nitrogen from land to oceans.
B) Both processes release nitrogen into the atmosphere.
C) Both processes remove nitrogen from the atmosphere.
D) Denitrification takes nitrogen from the air and makes it usable by plants;nitrogen fixation reverses this process.
E) Nitrogen fixation takes nitrogen from the air and makes it usable by plants;denitrification reverses this process.