Define permafrost.
Awater below the surface of the tundra stays frozen all year long
Bthe frozen soil in mountain highlands
Crainwater that collects on rocks after a cold rainstorm
Dthe dew droplets that freeze at high altitudes
Awater below the surface of the tundra stays frozen all year long
Bthe frozen soil in mountain highlands
Crainwater that collects on rocks after a cold rainstorm
Dthe dew droplets that freeze at high altitudes