The zone of seasonally frozen ground that exists between the subsurface permafrost layer and the ground surface is called the

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The zone of seasonally frozen ground that exists between the subsurface permafrost layer and the ground surface is called the active layer. It is characterized by the annual freeze and thaw cycles in areas with a seasonal temperature range. The other options are incorrect: 
A) Gelifluction is a slow movement of soil due to freeze-thaw cycles in areas with permafrost.
B) The discontinuous region refers to the extent of permafrost where there are gaps in the continuous permafrost cover. 
D) Talik is the layer of unfrozen ground that can exist beneath a layer of permafrost due to geothermal heat or other factors.
E) The freeze-thaw zone refers to the surface layer of soil that thaws and refreezes annually, but does not specifically refer to the layer between permafrost and the surface.

The Zone of Seasonally Frozen Ground That Exists Between the Subsurface