Which of the following best describes fuel gas?

Fuel gas is best described as natural gas and similar gases that are utilized for various applications such as heating, cooling, or cooking. This definition highlights the primary function of fuel gas in practical scenarios where it serves as an energy source for residential and commercial installations. Natural gas, a common type of fuel gas, is composed mainly of methane and is often delivered via pipelines for convenience and efficiency.

This option accurately captures the essence of what fuel gas encompasses, focusing on common sources that are utilized in everyday activities, distinguishing it from other gases that may not be as widely used or have more specialized functions. Other types of gases mentioned in the other choices do not align with the typical classification and usage of fuel gas, emphasizing its role in energy provision to directly support home and commercial energy needs.