The mississippi river is a physical feature as it was discovered during a time where man weren`t capable of such construction in the earth.
Answer:
3.) Pumice
Explanation:
"Pumice is widely used as an abrasive in soaps and cleaners. It is considered one of the softest abrasives on earth."
Streams erode sediment from their banks. They pick up and transport sediments. As a stream erodes its banks, it creates a V-shaped valley (Figure above). This contrasts with the U-shaped valleys created by glaciers.
I believe the term you are looking for is called an agora.
They are based on Islam or Christianity
