Trees Do Not Grow in the Tundra Because The

Question

Trees do not grow in the tundra because the:
A)Land shifts from time to time
B)Land is too swampy
C)Air is too thin
D)Shrubs are too plentiful
E)Permafrost is always frozen

Accepted Answer

In the tundra,only the topmost layer of soil thaws;the permafrost beneath this layer is always frozen.