Turbidity. As your book/question states it is a measurement of cloudiness in water.
Russians felt like they weren’t being treated well only a very small portion of people were rich and had everything. One reason for the revolution was the Bloody Sunday In 1905 there was a protest against Tsar Nicholas II. People wanted better working and living conditions, even though the protest was peaceful the soldiers attacked the people.
A plebeian is known as a commoner
I think it's Han
Hope this helps
The answer is c. A hint would be there is lots of sand there.
