Final answer:
The Douglas Fir is a major coniferous tree commercially grown in the Pacific Coast forest region of North America.
Explanation:
Douglas Fir (Pseudotsuga menziesii) is a major tree of the Pacific Coast forest region of North America and one of the most commercially grown trees. It belongs to the coniferous tree family, which includes pine, spruce, fir, cedar, and hemlock, making them important for the lumber and pulp industry.
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