Question

what is permafrost?​

Answer 1

Answer:

a layer of soil that is permanently frozen, in very cold regions of the world

Answer 2

Permafrost is any ground that remains completely frozen—32°F (0°C) or colder—for at least two years straight. These permanently frozen grounds are most common in regions with high mountains and in Earth's higher latitudes—near the North and South Poles. Permafrost covers large regions of the Earth.