Question

What is diffusion? not from web site only from book​

Answer 1

Required Answer:

☑Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. 

☑Diffusion happens in liquids and gases because their particles move randomly from place to place. 

☑Diffusion is an important process for living things; it is how substances move in and out of cells.

Answer 2

Answer:

The movement of solid or gas particles from in and out of the cell from higher concentration region to lower concentration region is called diffusion.

Hope that helps you ✌️