Vegetarianism is not for me but I respect it!  It involves not eating the flesh of any animal.
What do vegetarians eat if they don't eat animals?
There are different variations of being a vegetarian, but generally fruits and veggies, beans and other things that are grown.  Some eat eggs and dairy.
Oh wow, I guess it's not for me either!  How do they get their protein?
I imagine that's why some vegetarians add the eggs (ovo-vegetarians) or dairy (lacto-vegetarian)!  Soy is also an option