Which of the following is non-renewable source of energy?

Options

A. Coals
B. Gobar gas
C. Solar energy
D. Tidal energy

Answer

To determine which of the following is a non-renewable source of energy, we need to understand what non-renewable energy sources are.

### Step-by-Step Solution:

1. **Definition of Non-Renewable Energy**:
- Non-renewable energy sources are those that cannot be replenished or replaced once they are used up. This means that once we exhaust these resources, they are gone for good.

2. **Examples of Non-Renewable Sources**:
- Common examples of non-renewable energy sources include fossil fuels such as coal, oil, and natural gas. These resources take millions of years to form and cannot be regenerated in a human time scale.

3. **Identification of Non-Renewable Sources**:
- When presented with a list of energy sources, look for those that are derived from fossil fuels or are finite in nature. For instance, coal and oil are non-renewable, while solar energy and tidal energy are renewable.

4. **Conclusion**:
- Based on the understanding of non-renewable energy sources, if the question provides options such as coal, oil, natural gas, and renewable sources like solar or wind energy, the correct answers would be coal, oil, and natural gas.

### Final Answer:
The non-renewable sources of energy are coal, oil, and natural gas.

---