The correct description of the convection pattern between 30°S and 30°N latitude is:
Hotter air rises and moves away from the equator, then cools and falls and moves back to the equator.
This pattern is part of the Hadley cell circulation, where warm air near the equator rises, travels towards the poles at higher altitudes, cools down, and then descends around 30° latitude, creating a cycle of convection.