Which of the following terms refers to snow formed through deposition and aggregation?

The term that refers to snow formed through deposition and aggregation is "snow." This process involves water vapor in the atmosphere changing directly into solid ice crystals without first becoming liquid water, a transformation known as deposition. These ice crystals can then collide and stick together to form larger snowflakes through aggregation.

The process of deposition allows for the formation of intricate and unique snowflakes, showcasing the diverse structures that can emerge from this phenomenon. Once these snowflakes accumulate, they contribute to snowfall, which we experience as snow on the ground.

Graupel, on the other hand, refers to a type of precipitation that forms when supercooled water droplets freeze onto a snowflake or ice crystal, resulting in a pellet-like structure; this is not formed purely by deposition. Sleet is an entirely different phenomenon, consisting of ice pellets that form when raindrops freeze during their fall, while flurries simply describe light snowfall with little accumulation and do not specify the formation process.