Gyres are circular, rotating ocean currents that

ANSWER:

Gyres are circular, rotating ocean currents that produces huge and massive wind movements.

EXPLANATION:

Gyres is commonly known as an event where the ocean current are in continuous circulating action. There is pattern or a cause due to which certain circulation current action is obtained and the reason for Gyres to occur is Coriolis effect. It is considered as there are of total 5 gyres around the earth. Gyre is also the reason due to which it affects the climatic condition.

Answer collision and mountain formation;

Answer barren with few trees, in the northern hemisphere;