Mountain with trees all on it.

This description shows a region, and it also shows the trait that defines that reason. What would be the best eplanation for the region shown here?
a.
This is a lake region (physical)
b.
This is a forest region. (human/cultural)
c.
This is a forest region. (physical)
d.
This is a lake region (human/cultural)

c. This is a forest region. (physical)