Step 1: Humidity definitions:
- Absolute humidity: the mass of water vapor in a specific air volume (e.g., grams per cubic meter). It quantifies the "water vapor amount".- Relative humidity: a percentage comparing actual water vapor to the maximum possible at that temperature.- Supersaturation: an unstable condition where air holds more water vapor than usual for its temperature.- Saturation ratio (or degree of saturation): similar to relative humidity.
Step 2: Identify the correct definition.
The question seeks the term for the "amount of water vapor in the air," which aligns with the definition of absolute humidity.