A perfume bottle is dropped in the corner of a room and it shattered. The odor of the perfume can be detected on the other side of the room. Which statement best describes this observation?

When the bottle shatters, perfume particles are concentrated near the spill. They spread through the room toward areas where fewer perfume particles are present, so the odor eventually reaches the other side. This movement from high concentration to low concentration is diffusion, described by choice A.

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