How do changes in wind currents affect the short-term climate in a region? prevailing winds can cause a milder climate with heavy rain. global winds can cause a longer summer. prevailing winds can cause heavy rains or a dry climate. global winds can cause a longer winter.

Prevailing winds can cause heavy rains or a dry climate affect the short-term climate in a region.

Option a

Explanation:

An important air current that plays a major role in affecting climate is called as prevailing winds. The wind that blows in one direction than from other directions is called as Prevailing winds.

It can result in climate of one type to another type of climate in a region. When warmer winds start travelling over water surface it usually collects moisture during their travel. This presence of water vapour in the air start condensing as it moves into colder climates.  

This is the reason why the temperature in coastal areas is often receiving heavier rainfall.

81 is a composite number.