The statement is the best example of a supporting reason for the Claim is that the challenges of providing oxygen on the moon far outweigh any benefits of living there.
Reason is known to be the cause for something to take place or the power of the human brain to think, known and engage in logical thought.
From the above context, living in the moon will make us to spend millions and trillions on oxygen and so the challenges of providing oxygen on the moon far outweigh any benefits of living there.
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