Which of the following is not a renewable resource?

A. Water
B. Wind
C. Fossil Fuel
D. Sun

C. Fossil Fuel

C. Fossil Fuel is not a renewable resource.

To determine which of the options is not a renewable resource, we need to understand what renewable resources are. Renewable resources are natural resources that can be replenished or regenerated within a short period of time.

Let's examine each option:

A. Water: Water is a renewable resource as it can be naturally replenished through the water cycle, where water evaporates from the surface, condenses into clouds, and then precipitates back to the earth as rain or snow.

B. Wind: Wind is a renewable resource as it is generated by the uneven heating of the Earth's surface due to the sun's radiation. This creates air pressure differences that cause air to move, resulting in wind.

D. Sun: The sun is a renewable resource as it provides an inexhaustible supply of energy through sunlight. This energy can be harnessed through solar panels and converted into electricity.

Now, let's focus on option C:

C. Fossil Fuel: Fossil fuels, such as coal, oil, and natural gas, are NOT renewable resources. They are formed over millions of years from the remains of ancient plants and animals that were buried and subjected to heat and pressure. Fossil fuels are being consumed at a much faster rate than they can regenerate, making them non-renewable resources.

Therefore, the correct answer is C. Fossil Fuel. It is not a renewable resource.