(WILL MARK BRAINLIEST & 95pts) Some scientists believe that the chain of underwater mountains beneath the Pacific, which stretches away from Hawaii up to Alaska, may have once included even more mountains. What probably happened to those mountains?
a. They were destroyed by a hot spot
b. They were subducted into the mantle
c. They became part of the mid-ocean ridge
d. They were flattened to become an abyssal plain

c. They became part of the mid-ocean ridge

Explanation:

The mountains can make a ridge...they can't become a plain because they are not on land.The mountains also can't be destroyed by a hot spot. The only 2 possible answers are b and c. I believe c is the best answer. Hope it helps:)

since there isn't any suggested answers i will give you the reason and hopefully you can figure it

south africa, or rather all of africa, has not been in the location in which it is nowadays throughout the geological past. after the super-continent pangaea started to break apart, gondwanaland, in which was africa, moved further south, and parts of it came to be very close to the south pole. because the climate in this part of the world is very cold due to the very dispersed sun rays in there, what is now south africa, started to freeze, and the conditions were right for the formation of glaciers. the glaciers existed up until the period when gondwanaland started to break apart and what is now africa started to move towards north, sp it warmed up and the glaciers melted.

's the question?