What causes two distinct pressure zones between the equator and the poles? . a. the troposphere interacts with the stratosphere. b. gravity. c. the coriolis effect. d. ionospheric interactions with radiation .

The correct answer is C. The Coriolis effect. 

Coriolis effect causes two distinct pressure zones between the equator and the poles. It couldn't be because the troposphere interacts with the stratosphere, or because of the gravity or because of Ionospheric interactions with radiation. 

The correct answer choice is:

C. The Coriolis effect. 

The Coriolis effect is an inertial force that acts on objects that are in motion relative to a rotating frame of reference. It makes storms swirl clockwise in the Southern hemisphere and counterclockwise in the Northern Hemisphere. In simpler words, we can also say that this is the effect which forces the winds to shift towards the right or left.

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