During diffusion, what eventually happens to the concentration of molecules? which direction do the molecules move a across a membrane?

its the cell wall and the they are unique to plant

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation: