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

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

it would be rhyolitic hope this