Calculating the average precipitation and of a region can us to identify its climate patterns.
a. air pressure
b. humidity
c. temperature
d. wind speed

The correct answer is - C. temperature.

By having the information about the average precipitation, and the temperature patters of a region, we can easily identify the climate type of the place. While this doesn't mean that the climate type can be identified in detail, it can be easily be put in one of the wider climatic types.

For example, if there are high temperatures throughout the whole year, and the precipitation is very low, than it is easy to predict that it is a tropical climate in question, more specifically, a desert. Or if there's medium amount of precipitation, and the climate varies a lot from the hottest to the coldest period of the year, it means that it is a temperate climate type in question.

because there are alot of mountains

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.