Answer:
Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. ... This occurs in two steps: first, bacteria convert ammonia in to (nitrites) NO2-, and then other bacteria species convert it to NO3- (nitrate). Nitriates are a form of nitrogen that is usable by plants.
Explanation:
C. employment and unemployment
because it is the only one that makes sense
The light will not light up,
; the circuit is incomplete
Also I consider this physics and electronics
That looks like it's the cerebellum.