what process causes sedimentary rocks to turn back to sediment?\no a melting\no b cooling\no c weathering…

Brief Explanations:

Weathering breaks rocks into smaller pieces and erosion transports these pieces. Together, they cause sedimentary rocks to break down back into sediments. Melting turns rocks into magma, cooling solidifies magma or lava, and heat - and - pressure transform rocks into metamorphic rocks.

Answer:

C. Weathering and Erosion