Question

Underwater, divers must breathe a combination of ________ and ________.

1 blank choices nitrogen, oxygen, carbon dioxide

2 blank choices oxygen, helium, nitrogen

please hurry
ill mark as brainliest

Answer 1

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• Underwater, divers must breathe a combination of oxygen , nitrogen and helium .

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● Underwater, divers must breathe a combination of. Underwater, divers must breathe a combination of oxygen, nitrogen, and helium.

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Therefore, 2) Option is correct :)