Answer:
A. Visible light from the Sun
Step-by-step explanation:
Visible light from the sun also known as sunlight is responsible for warming the earth's surface, oceans and atmosphere through infrared radiation. When sunlight is absorbed by an object, the object converts the short wavelength light into long wavelength heat. This in turn makes the object become warm. Both the land and water reflects back some of the radiation to warm to atmosphere and objects found there.
The major source of energy that reaches the Earth’s surface comes from the Sun. Around 44% of solar radiation is in the visible light wavelengths, but the Sun also emits infrared, ultraviolet, and other wavelengths.
So, the energy that warms the earth primarily comes from visible light of the sun.