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.
I think (A) but let someone double check
No here is not an ethnoburb in Davis county
C. Leeward side; warm and dry