1. Where do most volcanoes occur? Why? 2. What is needed for magma to form?
3. If a volcano is dormant, can it become active? Can it become extinct?

1: they occur most in the ring of fire, mostly islands on the coasts.

2: a very hot source of heat and iron ore, nickel and rock.

3; yes they can come back alive and go dormant again, they can be extinct if the magma pocket closes or runs out of magma.

Explanation:

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.