Question

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

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

Explanation:

Polar air masses originate from polar regions, which are cold. They are typically dry (not associated with high humidity or large rain amounts) and have uniform cold and dry characteristics. Option a is wrong as polar regions are cold, not high - temperature. Option c is wrong because polar air masses are dry. Option d is wrong as they don't have large rain amounts. So the correct option is b.

Answer:

b. Uniform cold and dryness