Question

What is diffusion?
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Answer 1

Molecules can move into or out of cells by the process of diffusion . ... Diffusion is the net movement of molecules from an area where they are at a higher concentration to areas where they are at a lower concentration. This is due to the random movement of the molecules.

Answer 2

some materials moving from a region of higher region to lower region is known as diffusion.the transportation of gas in cell is taking place due to diffusion

I HOPE U UNDERSTAND