Considering the available options, the areas of North America that have vast expanses of untapped forests in Alaska.
This is evident in that Alaska has Boreal Forests, Chugach National Forest, and Tongass National Forest.
All these three huge forests are untapped and are in millions of acres.
The forests in Alaska are a high source of natural vegetation for the United States and the whole of North America.
Hence, in this case, it is concluded that North America has vast expanses of untapped forests in Alaska.
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