The most common energy source which is found in abundance in earth's crust is

Options

A. petroleum
B. coal
C. natural gas
D. All of the above

Answer

To solve the question regarding the most common energy source found in abundance in the Earth's crust, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options:
- A) Petroleum
- B) Coal
- C) Natural Gas
- D) All of the above

2. **Understand Fossil Fuels**: Recognize that petroleum, coal, and natural gas are all fossil fuels. They are formed from the decomposition of organic matter under intense pressure and heat over millions of years.

3. **Research Data**: Refer to reliable data sources to determine which fossil fuel is most abundant. According to the International Energy Agency's 2013 report, coal is identified as the most abundant fossil fuel.

4. **Compare the Options**:
- Petroleum and natural gas are significant energy sources but are less abundant than coal.
- The option "All of the above" suggests that all three sources are equally abundant, which is not accurate based on the data.

5. **Conclusion**: Based on the information gathered, the most common energy source found in abundance in the Earth's crust is **coal**.

### Final Answer:
**B) Coal**

---