This pie chart shows statistics related to the world’s population. A pie chart like this one is most helpful for

making predictions about the future.
showing how parts make up a whole.
presenting amounts over a period of time.
comparing information from different sources.

Showing how parts make up a whole

Explanation:

The pie chart is one of the best ways to show how statistical information makes up a whole.

In the case of a pie chart that shows the world's population, it can show what proportion or percentage of people live for example in a country like China, and represent it graphically as a part of the whole.

It could also do the same for continents, or any other type of division of the world, be it geographical or political.