In the mid-to-late 19th century, windmills on the great plains would have been most likely to have been used for a) gold mining. b) pumping water. c) grinding corn into meal. d) powering small factories.

Windmills are devices or machines which are specifically designed to use the wind force and convert it into power that humans could use in many ways.   Windmills have been used for may different purposes for many centuries and countries around the world.

In the mid to late 19 centuries, most windmills in the Great Plains were used to pump water. B is the correct answer. This water was primarily for humans and animal consumption.  In fact,  most of them are still been used nowadays for the same purpose.

The types of windmills used in the Great Plains were mainly of the self governing type, which allowed the machine to regulate its own speed during high winds. This was and important feature at the time, because it kept the entire structure protected, from being destroyed by the generation of centrifugal  forces during the operation in high wind conditions.    

can you explain it better

answer; i believe the answer is (b) fascism;