Which of these fuels is also called black gold?

Options

A. coal tar
B. Wood
C. Petroleum
D. Natural gas

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which fuel is referred to as "black gold."

2. **Understanding the Term "Black Gold"**: The term "black gold" is commonly used to refer to petroleum. This nickname is derived from its high economic value and its critical role in the energy sector.

3. **Explaining the Value of Petroleum**: Petroleum is a valuable resource because it is used to produce various fuels and products, such as petrol, diesel, and gasoline. Its widespread use and importance in modern society contribute to its nickname.

4. **Distinguishing from Other Fuels**: While coal is another important fuel, it is often referred to as "black diamond." This distinction helps clarify that the term "black gold" specifically refers to petroleum.

5. **Conclusion**: Based on the information gathered, we conclude that the fuel referred to as "black gold" is petroleum.

**Final Answer**: Petroleum is also called black gold.

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