Which mutation would be most beneficial to a peacock and its descendents?
larger more colorful tail
white plumage
blue eyes
overly curbed beak

A larger tail would be very useful to attract a mate. White plumage would probably do the opposite. Blue eyes would most likely be useless. A bigger beak may be helpful but the best choice would be A.

The  correct answer should be a waste

1) noble gases2) by increasing atomic number3) noble gases