Answer:
Option (A)
Step-by-step explanation:
In the atmosphere, the convection of heat takes place. The heat energy is trapped more abundantly and tightly near the surface of the earth, as a result of which the air near the earth's surface gets heated up and becomes less dense. Due to this, the warm air rises upward and as it moves upward, it slowly cools due to the decreasing temperature. It then forms a low-pressure zone and the denser air falls back. This process takes place repeatedly, as a result of which convection cells are formed. This carries the heat upward and downward in the atmosphere.
Thus, the correct answer is option (A).