Ventilation is the process which the air moves in and out of the lungs. Diffusion is the movement of gases without the use of energy and or effort by the body. Hope this helps!:)
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The possible genotypes are:

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good luck, i hope this helps :)</em>
Answer:
B. Experimental Bias because she she bought chocolate, but then she bought lowfat vanilla ice cream unknowingly. Therefore, the people liked more of the chocolate ice cream.
Hope this helped :3
Explanation: