Which energy source can be used in the greatest number of areas? geothermal energy, wind energy, hydroelectric power, or solar energy.

Wind energy because it's natural and some places dont have electricity.

Option (4)

Explanation:

The sun is the ultimate and best source of energy. A large amount of area on earth receives sunlight that can use it conveniently. The energy that is obtained directly from the sun is known as solar energy. This solar energy is widely and efficiently used in order to produce electricity.

There are many advantages of solar energy such as-

Easily available Cheap Pollution-free Renewable resource Alternate for fossil fuel

Thus, the correct answer is option (4).