None of the options provided accurately describe what happens to the heat energy absorbed by Earth. The correct response should indicate that the heat energy is absorbed by the Earth's surface and then released into the atmosphere, warming the air and contributing to weather patterns.
However, if you have to choose from the options given, the closest correct response would be:
It is reflected back to the sun.
Although not all of the absorbed heat is reflected back, a portion of solar energy is indeed reflected, with the remainder being absorbed and contributing to warming the planet.