Why did the u. s follow a policy of imperialism?

There are a number of reasons. First of all, American businesses looked for new markets abroad, and so some kind of imperial policy was thought necessary to achieve this goal. European colonial powers such as Great Britain and France had pursued such a policy for many years with much success; and as the American economy was rapidly becoming the world's largest, there was a certain logic to the United States emulating their example.

With growing economic power went growing political and military power. The United States was now recognized as a major player in international politics, and imperialism was a natural outcome of this. European countries had enhanced their standing on the world stage by the acquisition, development, and exploitation of their colonies, and it was thought that the United States might also do this. No longer was it enough for the United States to see itself as a beacon of liberty or the land of opportunity; it must also be respected in the old-fashioned way: hope this helps.

Explanation:

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.