Question

the movement of molecules from an area of high concentration to an area of low concentration is known as: diffusion osmosis active transport endocytosis

Explanation:

Diffusion is the process where molecules move from an area of high concentration to an area of low concentration. Osmosis is the movement of water molecules across a semi - permeable membrane. Active transport requires energy to move molecules against the concentration gradient (from low to high). Endocytosis is a process where cells engulf substances.

Answer:

Diffusion