Answer:
Tectonic plates collide.
Explanation:
Convergent boundaries are the meeting points of two tectonic plates that involve the collision of one plate with the other. Convergent boundaries can be subduction boundaries when there are two oceanic plates or an oceanic and a continental plate that are colliding.
Another type of convergent boundary is formed when two continental plates collide. When this happens, both of the plates buckle and fold to form high mountains since two continental crust plates cannot engage in subduction.
B - fur trade
If the question is asking about their occupation in America, then it’s definitely fur trading
National History Day? It's not exactly a geography term, but it is a national contest where you study a topic based on the theme of this year. This year it is taking a stand in history. It requires a lot of work, so sorry if this didn't help you.
C. Salts came from erosion of land
