Light : Sun :: Heat : ?

The correct answer is D. Stars.

Light and heat are both forms of energy that are emitted by the sun. The sun is a star, and all stars emit light and heat. Electricity is not a form of energy that is emitted by the sun. The moon is a satellite of the earth, and it does not emit light or heat. Fire is a chemical reaction that produces light and heat, but it is not a star.

Here is a more detailed explanation of each option:

• A. Electricity is a form of energy that is produced by the movement of electrons. It is not a form of energy that is emitted by the sun.
• B. Moon is a satellite of the earth. It does not emit light or heat. The light that we see from the moon is reflected sunlight.
• C. Fire is a chemical reaction that produces light and heat. It is not a star.
• D. Stars are giant balls of gas that emit light and heat. The sun is a star.