Réponse:
easiest: Baby-sitter
boring: Assembly line worker
tiring: farmer
useful: nurse
worse: prison warder
Explications:
easiest: you don't have to be qualified and make big studies, and if you're good at it, many parents may call you and pay you a lot.
boring: it's the same work every days.
tiring: you work 24/7 and you have to make sure everything is ok with the crops(not eaten) nd animals(not sick).
useful: if you have a member of your family that is sick or hurt, you can intervene.
worse: you can get insulted everyday and you have to be careful that the prisoners don't escape.