which of the following best describes abrasion?
a the falling of sheets off the top layer of rock
b the breaking down of rocks by other rocks
c the breakdown of rock due to burrowing animals
d the cracking of rocks due to water freezing
a the falling of sheets off the top layer of rock
b the breaking down of rocks by other rocks
c the breakdown of rock due to burrowing animals
d the cracking of rocks due to water freezing