Which statement about hail is correct? a. it is rain that falls through a layer of freezing air. b. it may freeze at high elevations many times before falling to the earth. c. it forms in winter in low stratus clouds. d. it is a liquid form of precipitation.

The correct option is It may freeze at high elevations many times before falling to the Earth

Hail are pellets of frozen rain which fall in showers from cumulonimbus clouds. Hail forms when thunderstorms are strong enough to carry water droplets well above the freezing level. This freezing process forms a hailstone, which can grow as additional water freezes. Eventually, the hailstone becomes too heavy for the updrafts to support it and it falls to the ground.

the part of the wave he is travelling on is the crest

double the distance = divide strength by 4