Which one of the following is not a fossil fuel?

Options

A. petrol
B. charcoal
C. kerosene
D. diesel

Answer

To determine which of the following options is not a fossil fuel, we need to understand what fossil fuels are and how they are formed.

### Step-by-Step Solution:

1. **Definition of Fossil Fuels**: Fossil fuels are natural substances formed from the remains of dead organisms (plants and animals) that have been buried under layers of earth for millions of years. Over time, heat and pressure transform these remains into fuels.

2. **Examples of Fossil Fuels**: Common examples of fossil fuels include:
- **Petrol**: Derived from crude oil, which is formed from ancient marine organisms.
- **Kerosene**: Also derived from crude oil, similar to petrol.
- **Diesel**: Another product of crude oil, formed from the remains of ancient organisms.

3. **Identifying Non-Fossil Fuels**: To find out which option is not a fossil fuel, we need to consider the origins of the substances listed.

4. **Analyzing the Options**:
- **Charcoal**: Charcoal is produced from wood through a process called pyrolysis, which involves heating wood in the absence of oxygen. Since wood comes from living trees and is not formed from ancient buried organisms, charcoal is not classified as a fossil fuel.

5. **Conclusion**: Based on the analysis, the correct answer is that **charcoal is not a fossil fuel**.

### Final Answer:
The option that is not a fossil fuel is **charcoal**.

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