Which statement best describes passive transport?
A. A substance goes from an area of high concentration to an area of low concentration, and this requires energy.
B. A substance goes from an area of high concentration to an area of low concentration, and this releases energy.
C. A substance goes from an area of low concentration to an area of high concentration, and this requires energy.
D. A substance goes from an area of low concentration to an area of high concentration, and this releases energy.
Answer: B
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