Answer:
1. If a fault doesn't move for a very long time. There won't be a Earthquake there.
2.Island arcs and oceanic trenches occur when both of the plates are made of oceanic crust. Zones of active seafloor spreading can also occur behind the island arc, known as back-arc basins. These are often associated with submarine volcanoes.
Explanation:
I hope this helps you. Good Luck!!! I wish you the best!!!!! :) :) :) :)
