Ventilation is the process by which air moves in and out of the lungs.Diffusion is the spontaneous movement of gases, without the use of any energy or effort by the body, between the gas in the alveoli and the blood in the capillaries in the lungs.
I think it is
rock metamorphosis
Hope it helped
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I believe it’s A……………………..
Arents and children
diverse cultures
urban vs. rural life
people and nature
False as there can be negative stimuli as well
