Your husband/wife's mother
Answer:
A sound argument is sensible and valid
Explanation:
Sound can mean strong so a strong argument would be sensible and valid
Nothing ever bothers you. the headaches you get when someone is annoying, and the satisfaction you get when you think about hurting them
Tell him to report this to a trusted adult and to not make a big scene of it to the bully just ignore him and not get the reaction the bully wants