Question

How does mountainous terrain affect settlements in a region

Answer 1

Humans have inhabited mountains. Obviously, the terrain presents poor infrastructure and limited access to agriculture. Humans there cannot freely travel due to poor terrain or adverse weather, so they cannot trade frequently nor travel from settlement to settlement. However, they still manage to do trade since they will need items like food and stuff they cannot produce in the mountains so they are not isolated. So the best answer is 1 groups develop their own cultures and traditions.

Answer 2

A person could say "all of the above" in the answer to the question. Mountainous terrain would likely be harmonious to some cultures and traditions; the necessity of travel (for trade), the Isolation from other groups would all affect settlers even if they were generally near by each other.