Most people in south america make a living in
investments.
manufacturing.
service or tourism industries.
agriculture or natural resources.

service or tourism industries

Explanation:

The majority of the people in South America are working in the service and tourism industries. The continent in general is very attractive for tourists, and there's hundreds of millions of tourists each year, so it is no wonder that the service and tourist industries have a lot of employees. South America has a very interesting culture, beautiful nature, lot of well preserved ancient architecture, world renowned manifestations, great weather, long beaches, festivals, the largest rainforest in the world. This attracts people of with all sorts of interests in the South America, which is helping the economy of the continent immensely.