Rocks carried by a river smash together and break into smaller pieces. this describes attrition abrasion solution hydraulic action

attrition.

Explanation:

Attrition is a type of force that is present when two surfaces come into contact. An example of this can be seen when rocks carried by a river break and break into smaller pieces, this is because the river causes contact between the rock surfaces that eventually tear them apart and cause them to break. The surfaces of these rocks come into contact because the river causes one rock to bump into the other rock, thus generating friction between them, causing attrition.

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation: