Which of the following is true about ice sheets?

a. They are the smallest type of glacier.
b. They flow in all directions.
c. They usually flow down valleys.
d. They are found only in high mountain areas.

c.They usually flow down valleys.

Explanation:Ice sheets are constantly in motion, slowly flowing downhill under their own weight. Near the coast, most of the ice moves through relatively fast-moving outlets called ice streams, glaciers, and ice shelves. As long as an ice sheet accumulates the same mass of snow as it loses to the sea, it remains stable.

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.