If you eat yourself will you get twice as big or disappear completely?
1) Yes
1) No

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.