The fossil fuel, among the following is

Options

A. petroleum
B. cow-dung cakes
C. firewood
D. agricultural wastes

Explanation

**Step-by-Step Solution:**

1. **Understanding Fossil Fuels:**
- Fossil fuels are natural substances that are formed from the decomposed remains of ancient plants and animals. Over millions of years, heat and pressure transform these organic materials into fossil fuels.

2. **Types of Fossil Fuels:**
- The main types of fossil fuels include coal, crude oil (petroleum), and natural gas. These fuels are considered non-renewable because they take millions of years to form and cannot be replenished within a human timescale.

3. **Identifying the Options:**
- The question provides several options: Cow dung, Cacks, Firewood, Petroleum, and Agriculture wastage. We need to identify which of these is a fossil fuel.

4. **Analyzing Each Option:**
- Cow dung: This is organic waste and is used as a biofuel, but it is not a fossil fuel.
- Cacks: This term is unclear, but if it refers to a type of fuel derived from organic matter, it is not a fossil fuel.
- Firewood: This is wood that is burned for energy, derived from trees, and is also not a fossil fuel.
- Petroleum: This is a well-known fossil fuel, derived from ancient marine organisms.
- Agriculture wastage: This refers to leftover plant material and is not a fossil fuel.

5. **Conclusion:**
- Among the options provided, the only fossil fuel is Petroleum. Therefore, the correct answer is Petroleum.

**Final Answer:**
- The fossil fuel among the following options is Petroleum.

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