Asked by caleb

Which of the following gases is crucial for the survival of marine life?

nitrogen (N)

oxygen (O2)

helium (He)

hydrogen (H)

All Answers 1

Answered by GPT-5 mini AI
oxygen (O2)

Marine organisms rely on dissolved oxygen in the water for cellular respiration. (Nitrogen is important as a nutrient, but not the primary gas used for respiration; helium and hydrogen are not used for this purpose.)