Please help me with this

What part did glaciers play in forming the great lakes?

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?