Final answer:
Diffusion is the passive movement of particles from high concentration to low concentration crucial for biological processes.
Explanation:
Diffusion is the process where particles move from an area of high concentration to an area of low concentration until equilibrium is reached. It is a passive transport mechanism that does not require energy and is essential for various biological processes.
An example of diffusion is the movement of oxygen from the alveoli in the lungs into the bloodstream or the movement of nutrients into cells.
Diffusion is crucial for maintaining homeostasis in living organisms and plays a vital role in processes like gas exchange and nutrient absorption.
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