Which event of the 1800s led to increased interest in the colonization of Africa?

Industrial revolution

Explanation:

As the industrial revolution flourished, the production of consumption of various goods also developed. The economy was on the rise, the market had a wider offer, and with it rose the demand.

Soon, more the materials were needed, and the producers of the Western countries could not find the supply that meets the demand in their own countries.

As the economy was much better and the military forces were stronger because of technological and economic advances, countries such as Britain, France, Spain, Portugal, etc. decided to start colonizing areas of Africa and Asia.

From these areas, they could get the materials and goods needed for the development and consumption, as well a provide new materials which could be considered as exclusive and exotic, and develop more economy around them.