Which property of natural gas makes it most useful and important?

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the property of natural gas that makes it most useful and important.

2. **Consider the Properties of Natural Gas**: Natural gas has several properties, including being a clean fuel, having a high energy content, and being easy to ignite. However, we need to focus on the property that contributes to its usefulness and importance.

3. **Evaluate Transportation**: One of the key advantages of natural gas is its ability to be transported easily. Unlike solid fuels (like coal) or liquid fuels (like oil), natural gas can be transported through pipelines.

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