Answer:
a historian is someone that lived during the rough times of history and talks all about it and what they did that is what a historian is.
Explanation:
Hope that this helps
People who worked as minors had to be at work or else they would lose their job they had no freedom. They were also paid which led to the term wage slavery.
Russia and Britain both gained partial control of Persia's economy.
The answer is Erosion, which is the the gradual destruction or diminution of something -- in this case, rocks. I hope this helps! For reference/perspective, sand is the product of rock erosion, because it's really just tiny remnants of crushed rock. Those "small pebbles" could be sand, but you'd have to emphasize just how small they are -- one grain of sand is just that: a grain