Which of the following describes an avalanche?

An avalanche is accurately described as a high-speed turbulent mix of air and snow. During an avalanche, large amounts of snow suddenly break loose from a slope and accelerate down the mountainside, mixing with air as it descends. This combination creates a dense flow that can be incredibly destructive, carrying snow, ice, and debris with it. The rapid movement and chaotic nature of an avalanche are key characteristics that differentiate it from other geological processes. Unlike the other options, which involve different materials and processes, the defining features of an avalanche involve the dynamic interplay between snow and air under the influence of gravity on slopes.