Answer:
Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
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Tysm!
The answer would be the first one because yes, the sun, moon, and earth are all in alignment, meaning all the gravity from the sun and moon will pull the oceans more, making it more high or more low idk where im going with this but yeah the answer is the first one XD