In the united states, the cool polar air masses and the warm tropical air masses come together to form a

a. blizzard.
.b. tornado.
c. hurricane.
d. thunderstorm.

The answer is C, because at the right temperature the cool polar air masses and the warm tropical create together a medium hot and medium cold wind that is called a hurricane.

Centriole.centrioles are present in animal cells but are usually absent in plant cells.