natural banks which are sometimes built up by a river along the edges of its channel are called:

a.river bluffs
b.river cliffs
c.levees
d.slip-off slopes

Natalia, Dina, Nyasha, or whoever,

Posting under multiple names fools no one.

You need to learn to go back into your textbook or study materials to find these answers – or learn to conduct simple searches. Enter each of the terms you listed until you find a definition that matches.

http://www.answers.com

http://en.wikipedia.org/wiki/Main_Page

http://www.google.com

Whatever your name is -- please do not keep posting under different names.

Also -- you seem to be fishing for answers for some online class. To show us that you're not trying to cheat, please indicate which of the answers is correct.
We'll be glad to check your answers.

The natural banks that are sometimes built up by a river along the edges of its channel are called levees. To find the answer, you can use a combination of general knowledge about rivers and the process of elimination. Let's break it down:

a. River bluffs: River bluffs refer to steep, high cliffs or banks along a river's edge. They are not built up by the river itself, and therefore, this option can be eliminated.

b. River cliffs: Similar to river bluffs, river cliffs are high, steep banks along the river's edge. They are not formed by the river building up sediment, so this option can also be eliminated.

c. Levees: Levees are natural banks that form along a river's edge as a result of the river depositing sediment over time. This option matches the description given, so it's a likely answer.

d. Slip-off slopes: Slip-off slopes refer to a characteristic found in meandering rivers, where sediment is deposited on the inside curves of the river. This does not match the description given, so it can be eliminated.

By process of elimination and understanding the characteristics of these terms, the correct answer is c. levees.