Need with this question (sources of information)

A globe

Explanation:

In order to find the shortest route between two places on Earth, it is useful to have a globe at hand. This is because the Earth is not flat, but rather a sphere. As a result, lines drawn on a flat map are not always as short or as long as they would be on a curved surface.

A great example is the shortest aerial route from Chicago to Seoul. On a flat map it appears that this would be over the middle of the Pacific Ocean, but the shortest distance between the two cities is actually a flight near the southern coast of Alaska. Why so far north? Because the Earth gets a lot slimmer towards the poles, the shortest route appears to curve on a flat map.

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.