Define permafrost.
a.water below the surface of the tundra stays frozen all year long
b.the frozen soil in mountain highlands
c.rainwater that collects on rocks after a cold rainstorm
d.the dew droplets that freeze at high altitudes
a.water below the surface of the tundra stays frozen all year long
b.the frozen soil in mountain highlands
c.rainwater that collects on rocks after a cold rainstorm
d.the dew droplets that freeze at high altitudes