Question

formation from different media and formats
stery check
read the passage. then answer the question.
based on the information in the text, how do glaciers form?
glaciers a glacier is a large, slow - moving mass of ice. it forms as snow piles up and becomes densely packed, changing to solid ice. it is so heavy that the bottom gets warmer and melts. this causes the glacier to slide across the land.
one type of glacier is an alpine glacier, which forms high in the mountains and moves downward. these glaciers often push dirt and rocks ahead of them as they move through valleys. sometimes several glaciers come together in one large field of ice.
continental glaciers begin as a dome of ice and spread out in
a huge areas of land freeze in cold weather.
b dirt and rocks in valleys combine with ice.
c rivers freeze and come together in a field of ice.
d piles of snow are packed down and turn into ice.

Explanation:

The text clearly states that a glacier forms as snow piles up and becomes densely packed, changing to solid ice.

Answer:

D. Piles of snow are packed down and turn into ice.