pronoun
those same people, animals, or things
a - used as the object of a verb or preposition to refer to people, animals, or things that have already been mentioned
b - used for emphasis to refer again to people, animals, or things that have already been mentioned
himself or herself - used to refer to a single person whose sex is not known or specified
their normal or healthy selves
by themselves
without any help from other people
with nobody else :alone