Question

The troposphere is warmed by the _____.

Answer 1

The correct answer to the question stated above is the third option which is: radiated heat from the Earth's surface.
The troposphere is the lowest layer of Earth's atmosphere.
The troposphere is heated from below. Sunlight warms the ground or ocean, which in turn radiates the heat into the air right above it.
Therefore, the troposphere is warmed by the radiated heat from the Earth's surface.