Frost is formed through which process during anticyclonic conditions?

Frost is formed through the process of deposition, which is when water vapor changes directly into solid ice without becoming liquid first. This typically occurs when air temperatures drop below the freezing point, and the water vapor in the air crystallizes on surfaces like grass, leaves, and car windshields. During anticyclonic conditions, the atmosphere tends to be stable and calm, allowing for clear skies and cooler temperatures at night. This facilitates the cooling of surfaces to the point that they can reach the dew point, leading to frost formation.

In this scenario, the other processes mentioned do not accurately describe how frost forms. Evaporation involves liquid water turning into vapor, which is opposite to the process that creates frost. Condensation refers to vapor changing into liquid and is more relevant to the formation of dew. Precipitation is related to various forms of water falling from clouds and is not a factor in the direct formation of frost. Thus, deposition is the accurate process explaining the formation of frost under the described conditions.