How does moisture get added to air?

Moisture is added to air primarily through the processes of evaporation and sublimation. Evaporation occurs when water from sources such as lakes, rivers, and oceans transitions into vapor, increasing the humidity in the atmosphere. Sublimation is the process where ice or snow transitions directly into water vapor without first becoming liquid, which also contributes to moisture in the air.

These processes are essential for the water cycle and illustrate how the atmosphere can hold varying amounts of moisture, influencing weather conditions and climate. The other options, while related to moisture, do not represent primary mechanisms for adding moisture to air. Precipitation and condensation are processes that involve moisture being released from the atmosphere rather than added, while fog formation is a condition resulting from moisture already present in the air.