Question

what causes the global convection current between the equator and the poles?
a. magnetic field variations
b. the coriolis effect
c. earths rotation
d. temperature differences

Explanation:

Global convection currents between the equator and poles are mainly driven by temperature differences. The equator receives more solar radiation (is warmer), causing air/water to rise. At the poles, it's colder (air/water sinks). This creates a circulation pattern. The Coriolis effect (due to Earth's rotation) modifies the direction of these currents but is not the cause of the convection itself. Magnetic field variations have no direct role in creating these convection currents.

Answer:

D. Temperature differences