Final answer:
Diffusion is a passive process of transport, while endocytosis and exocytosis are active processes. Diffusion moves substances from high to low concentration, while endocytosis brings materials into the cell and exocytosis releases materials from the cell.
Step-by-step explanation:
Diffusion is a passive process where a substance moves from an area of high concentration to an area of low concentration until the concentration is equal.
Examples of diffusion include the spreading of a gas in a room. On the other hand, endocytosis is a form of active transport where materials are taken into the cell by the formation of vesicles. This process is used by cells to take in substances from the extracellular environment.
Exocytosis is the opposite of endocytosis, where vesicles containing substances fuse with the plasma membrane and release their contents to the outside of the cell. This process is used by cells to export materials.