Explain, why Native American populations reduced to one-fifth of its pre-Columbian numbers. OR Define the Columbian exchange. Give a detailed description of the phenomenon. Please include examples of things exchanged from the “Old” to the “New” World and vice versa.

Because of people coming into the "New World

Explanation:

We know that a lot of people wanted to go to the new world to be free and maybe even to figure out who are patriots and who aren't also at the first colony plymoth was made because of the question of releigion but that is another thing so because of all of the new people all of the Native American started reducing population.

hello there!

the graphics that you have attached within the question, indicates that few people in bolivia work in industry according to its labor force.

however, the graphic that is on the right side of the picture shows the gdp sector in bolivia. this gross domestic product is a macroeconomic magnitude   that shows the monetary value of all finished goods and services within a country's borders in a specific time period. in this case, the graphic is showing the monetary value in each sector -agriculture, industry and services- of bolivia in 2012.

so, although the first graphic located at the left side indicates that not so many people work in industry, this is the second most important sector according to the gdp metrics because of the monetary value that impacts on its country. it does not need to be the most valuable one. if it makes an impact on the country's economy, it will be definitely crucial to it.