Question

1. what is a unique feature of polar air masses?

a. high temperatures
b. uniform cold and dryness
c. large amounts of rain
d. high humidity

Explanation:

Polar air masses originate in polar regions, which are cold. They are also typically dry. Option a is incorrect as polar regions are cold, not high - temperature. Option c is wrong because polar air masses are dry and don't have large amounts of rain. Option d is incorrect as high humidity is not a feature of polar air masses; they are dry. So the correct option is b.

Answer:

b. Uniform cold and dryness