Question

which gas a human needs mostly.
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Answer 1

Answer:

Question:

which gas a human needs mostly?

Answer:

Human needs Oxygen mostly.

Human needs Oxygen mostly because of following reasons:

• Oxygen plays a critical role in respiration.
• We humans, along with many other creatures, need oxygen in the air we breathe to stay alive.
• Oxygen is generated during photosynthesis by plants and many types of microbes.

Hope it helps.

Answer 2

Explanation:

oxygen is your answer

because we need oxygen to breathe