It depends, you really cant decide that but the meaning of life is death so does it really matter?
I'd have to say d. the hand, because every human (for the most part, no offence intended to anyone) has a hand and is able to make good (or bad, rather) use of it. It's what a person always has access to at any given time or place, even if they don't have access to one of the other options.
Answer:
the retention of juvenile features in the adult animal.
the sexual maturity of an animal while it is still in a mainly larval state, as in the axolotl.
idk if the pics will load
