Which of the following statements best expresses a reason for european imperialism in the 1800s?
a.
birth rates in europe were rising, and nations wanted new lands to house growing populations.
b.
european nations wanted to control lands that had raw materials for industry and manufacturing.
c.
european leaders believed that imperialism would bring about global security and world peace.
d.
countries in regions such as africa and the middle east sought out economic support from foreign nations.

B.  

European nations wanted to control lands that had raw materials for industry and manufacturing.

Explanation:

In the wake of the industrial revolution, the international order changed. Nations needed raw materials and markets, and they needed to secure them before other nations did. That also shaped the form of imperialism used in the 1800s. Before, the European countries tried to settle in the conquered territories and work the land. But in 1800, nations established outposts and an extractive economy that sought to obtain the raw materials as quickly and as efficiently as possible.  

Nations also needed to control markets for their goods, which led to wars against large Empires like China, which was a huge potential market. The British set an example for other Nations by imposing trade treaties with the use of warships.