Question

how does convection occur in the troposphere?
the suns rays heat earths surface.
warm air rises and cool air sinks.
the warm ground heats the air above it.
the suns electromagnetic waves reflect off clouds.

Explanation:

Convection is the transfer of heat by the movement of a fluid (like air) where warmer, less dense fluid rises and cooler, denser fluid sinks. In the troposphere, this occurs as warm air rises (due to lower density) and cool air sinks (due to higher density), which is the process of convection. The other options: heating Earth's surface is radiation/heating the ground, heating air above ground is conduction/heating, and reflection off clouds is not convection.

Answer:

B. Warm air rises and cool air sinks.