Answer:
Earth, Venus, mars, Mercury , Neptune, Saturn, Jupiter , Uranus
Explanation:
D. Helps diagnose health problems
Answer:
I know its not Oxygen (O2) because we need that gas to breath if not more of that gas! and i know its not helium because it is not very toxic and not a crisis in the world
Your answers are going to be B. and D.
have a nice day!
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I believe the answer is the third option. Hope this helps! Please tell me if I am wrong or if there was an error in my answer... also sorry this answer is late.