Question

question 1 (1 point)
how do deep ocean trenches form?
a mantle plume softens the crust, and it sinks.
a continental plate collides with a continental plate
an area of divergence or spreading occurs
an oceanic plate collides with a continental or younger oceanic plate.

Explanation:

Deep - ocean trenches form at convergent plate boundaries. When an oceanic plate (which is denser) collides with a continental plate or a younger oceanic plate, the denser oceanic plate subducts beneath the other plate, creating a deep - ocean trench. Mantle plumes are related to hotspot volcanism, continental - continental plate collisions form mountain ranges, and divergence or spreading creates mid - ocean ridges.

Answer:

D. An oceanic plate collides with a continental or younger oceanic plate.