Why did the students post their “twelve theses” in the entrance hall of the university?

to show their opposition to Nazi policies
to show their support for a Jewish teacher who was about to be fired
to demand reforms to university tuition policies
to call for the expulsion of all non-German professors

To call for the expulsion of all non-German professors.

Explanation:

"The Twelve Theses" was a text published by the German Student Union. These books called for the elimination of all "Jewish aspects" of culture from German literature. Among many other requests, it asked for a ban on publishing works by Jewish authors in Germany, and a ban on German translations of foreign books. It also called for the expulsion of non-German professors.

a

"the land of the dead"

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.