What kind of air masses form over land?
a) maritime air mass
b)polar air mass
c)continetal air mass
d)tropical air mass

Continental Air Mass.

Explanation: The mass of air that is formed over land is continental air mass. The air that is hotter and colder air masses that moves over land.

Continental air masses are dry and other air masses such as monsoon and maritime are moist. These air masses are hotter in the tropical regions and colder in the regions of North america.

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.