Answer:
Option (2)
Step-by-step explanation:
The earth's global surface temperature is controlled by the amount of incoming solar radiation. The more the amount of sunlight, the more is the surface temperature. This light when incident on the land and water surface, the rocks, soils, and water absorbs the sunlight, and subsequently releases the heat back into the atmosphere in the form of radiations. This heat energy is trapped in the atmosphere as a result of which, it leads to an increasing amount of surface temperature.
Thus, the amount of solar radiation is directly proportional to the earth's surface temperature.
Hence, the correct answer is option (2).