Both weathering and erosion produce
a. sediment
c. mass movement
b. carbon dioxide
d. igneous rocks

Both weathering and erosion produce sediment

Weathering, by definition, is the physical integration and chemical decomposition of earth materials at or near the earth’s surface. Erosion, by definition, is the gradual destruction of something by natural forces (e.g. water, wind, ice). Therefore, the characteristic of both weathering and erosion is that it occurs naturally.

it sounds like either a or c