Answer: Options A, B and D.
Explanation: shields are layers of old rocks that metamorphosed as a result of mountain-building events. Shields also have sedimentary layers that usually rest on the lava of the rock.
Answer:
c) The eruption at point A would be quiet because the magma that squeezes out through oceanic crust has low silica and gas content.
I think (IM NOT COMPLETELY SURE) its profit incurred on a good or service.