Identify the igneous rocks:

a.) slate

b.) red volcanic rock

c.) lava rock covered by sulphur

d.) sandstone

B.) Red Volcanic Rock

C.) Lava Rock covered by Sulphur

Explanation:

Igneous rocks are rocks that forms from the cooling and solidification of magma. Magma is a melt or molten rock. Magma is usually derived from rocks that have been buried and subjected to extreme temperature conditions.

Red volcanic rocks and lava rocks covered with sulphur  are classified as volcanic rocks. Volcanic rocks are formed from magma that settles and cools on the surface of the crust. These magma is called lava.

Slate is a metamorphic rock and sandstones are sedimentary in nature.

c, this answer is productivity.

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.