Which group of clues is most useful for identifying dew, frost, and fog at the same place in the morning?

Correct answer: Liquid droplets on a surface, ice crystals on a surface, and suspended droplets in the air

Answer: A. These three forms of condensation are identified mainly by where the water is found and whether it is liquid or solid. Dew is liquid water in droplets deposited on a cool surface. Frost is ice crystals or frozen deposit on a surface, normally associated with freezing conditions. Fog consists of tiny droplets suspended in air near the ground and can reduce visibility. Option A is correct because it gives the location and physical state for all three forms. Options B, C, and D are wrong because their clues concern unrelated land, water, tectonic, or volcanic features and cannot identify these atmospheric moisture forms. A useful method is to ask two questions: Is the moisture on a surface or floating in air? Is it liquid or ice? Memory cue: dew equals liquid surface, frost equals icy surface, fog equals droplets in air.