Fill in the blanks to complete this passage about geologic processes.

A geologist is studying the shore along a river. She finds a pile of rocks at the base of a riverbank. These broken rock pieces are the result of blank
. A little farther along the river, the geologist finds some smaller pebbles in a very shallow, slow-moving section of the river. These rocks were moved to this location through the process of blank
. The process of the rocks actually being placed here is called blank
.