One of the biggest reasons was that there were some revolutions that happened around the lat 19th century. They were primarily sparked by lower class individuals who were looking for more money to support themselves/families.
Hills are easier to climb than mountains. They are less steep and not as high. But, like a mountain, a hill will usually have an obvious summit, which is its highest point. According to the U.S. Geological Survey, there is no official difference between hills and mountains.
Answer:
limestone is an example of organic sedimentary rock
