Question

which of the following is true of high clouds?
a. they do not usually bring precipitation.
b. they generally produce hail and tornadoes.
c. they eventually evaporate to form fog.
d. they are composed mostly of liquid water.

Explanation:

High clouds are typically found at altitudes above 20,000 feet. They are composed mainly of ice crystals (not liquid water, so D is wrong). Fog forms near the ground from the cooling of air, not from high - cloud evaporation (so C is wrong). Hail and tornadoes are associated with severe thunderstorms (cumulonimbus clouds, which are not high clouds, so B is wrong). High clouds like cirrus, cirrostratus, and cirrocumulus do not usually bring precipitation.

Answer:

A. They do not usually bring precipitation.