Answer:
Abrasion, attrition, hydraulic action and solution. Abrasion is the process of sediments wearing down the bedrock and the banks. Attrition is the collision between sediment particles that break into smaller and more rounded pebbles.
South Sudan
Explanation:
It got independence in 9 July 2011 through a referendum
The troposphere
It begins at the surface of the earth and extends out.
