Which of the following is not an option source of energy ?

Options

A. Air
B. Water
C. CNG
D. Sun

Explanation

To determine which of the following is not an option source of energy, we will analyze each option provided:

1. **Air**: Air can be harnessed for energy through wind turbines, which convert wind energy into electrical energy. Therefore, air is considered a renewable source of energy.

2. **Water**: Water is used in hydroelectric power plants to generate electricity. It is also a renewable source of energy, as it can be replenished naturally.

3. **CNG (Compressed Natural Gas)**: CNG is a fossil fuel that is used as an alternative to gasoline or diesel. While it is considered a cleaner fuel compared to other fossil fuels, it is not a renewable energy source because it is derived from natural gas, which is a finite resource.

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