How many BTU's are contained in a therm of natural gas?

The correct answer is associated with the standard measurement of energy content for natural gas. A therm is a unit of heat energy equivalent to 100,000 British Thermal Units (BTUs). This is particularly significant in the context of utility billing and energy conversions, where therms are commonly used to quantify gas consumption.

In practical applications, understanding this conversion is crucial for calculating energy needs, costs, and understanding efficiency in gas usage. While the other options present varying and incorrect values, they do not align with the standard definition of a therm, which is universally accepted as 100,000 BTUs. This standardization helps ensure consistent calculations across various applications in the energy sector.