Ref: online search (Changes to short stretches of nucleotides are called gene-level mutations, because these mutations affect the specific genes that provide instructions for various functional molecules, including proteins. Changes in these molecules can have an impact on any number of an organism's physical characteristics.)
Individuals will vary. in a group, majority wins, so you'll get a more all-around/generalized answer from a group
A. Deposition, erosion is the sediments actually moving and weathering is the wearing down and breaking of the sediment.