In tropical regions known for warm, daily showers, the cloud coverage is most likely to be nonexistent rare cloudy most of the time cirrus clouds

The answer to the question stated above is "most of the time cirrus clouds"

In tropical regions known for warm, daily showers, the cloud coverage is most likely to be most of the time cirrus clouds.
>> tropical regions, located just north and south of the equator, are known for being warm and humid. 

Answerseafloor spreading;

The correct answer is a)  a resource with a limited supply; it will run out.