D. the breaking of rock into smaller pieces from nonchemical processes
The correct answer to the question "What is physical weathering?" is D. The breaking of rock into smaller pieces from nonchemical processes. Physical weathering refers to the mechanical breakdown of rocks into smaller fragments without any change in their chemical composition. It occurs through various processes such as temperature changes, freezing and thawing, abrasion by wind and water, and the pressure exerted by plant roots.
