Answer:
they choose their occupations for them
none of them have memories of sunlight and animals because the giver has them and there isn't anything else in the city
they aren't allowed out of the city and if they tried to escape they try to kill them
Well, when its in first person you get more of an insight on how they really feel and think while when its in third person you have to rely on a guess and not a fact. So it limits the readers knowledge on the thoughts and feelings of the main character. Hope this helps :)