Question

what is a cause of mechanical weathering?
○ sunlight
○ natural acids
○ rainwater
○ physical forces

Explanation:

Mechanical weathering is the physical breakdown of rocks without changing their chemical composition. Physical forces (like freezing - thawing, wind, water erosion, etc.) directly cause rocks to break into smaller pieces. Sunlight alone doesn't cause mechanical weathering directly. Natural acids cause chemical weathering (changing rock's chemistry). Rainwater can be part of mechanical weathering (like in freeze - thaw when water freezes in cracks), but the most direct and defining cause of mechanical weathering is physical forces.

Answer:

D. physical forces