A hurricane forms when a gains strength over ocean waters.
O A. typhoon
B. polar storm
C. occluded front
D. tropical depression

D.

Explanation:

it's a hurricane tropical depression is a storm that turns into a hurricane

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.