Correct option is B
The correct answer is
(b) Diffusion.
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Diffusion is the process where molecules move from an area of
higher concentration to an area of
lower concentration until they are evenly distributed. It is a passive process that does not require energy and occurs in gases, liquids, and solids.
Information Booster:
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Evaporation: The process by which a liquid turns into a gas at temperatures below its boiling point.
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Sublimation: The direct transformation of a solid into a gas without passing through the liquid phase.
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Condensation: The process by which a gas turns into a liquid when cooled.