Which statement best explains the role of weathering and erosion in the rock cycle? a. rocks melt by this process. b. molten rocks solidify by this process. c. they change the mineral composition of rocks. d. they break rocks and transport them to new locations.

Should be D I think :)

The answer is D. They break rocks and transport them to new locations.

Explanation:

Weathering is the physical process in which a breakdown or breakage occurs in the rock, but without affecting its chemical or mineralogical composition, while the erosion of the rocks is the process that refers to the movement or transport of the material, in contrast to the alteration and disintegration of the rocks. It is one of the main factors in the rock cycle.

The O2 you inhale comes from and where the CO2 you exhale goes. The exchange of gases doesn't only take place in the cells in your body. Gas exchange is taking place all around you. They produce oxygen during a process called photosynthesis. ( I hope this helps )