In the northern hemisphere, gyres
spin clockwise
spin counterclockwise
move in straight lines
move diagonally

The answer is spin clockwise.

In the northern hemisphere, gyres spin clockwise due to Coriolis effect. Coriolis effect is the effect of the Earth's rotation on the oceans and atmosphere. It is the cause of deflection to the right in the northern hemisphere and to the left in the southern hemisphere. Thus, in the northern hemisphere, gyres spin clockwise, and in the southern hemisphere, they spin counter-clockwise.

Answer (a) the itcz comes overhead for part of the year; i believe this is correct,plz check first; ///

Answer (d) may increase or decrease porosity through dissolution or deposition;