Read the following paragraph from the section "The spread of the Industrial Revolution".

Industrialized nations used their strong armies and navies to colonize many parts of the world that were not industrialized. They needed raw materials for their factories. This colonization is known as imperialism. In 1800, Europeans occupied or controlled about 34 percent of the land surface of the world. By 1914, this had risen to 84 percent.

Which of the following BEST explains the purpose of this paragraph?