I think my dad has depression, what do you think?

he is old your supposed to expect this cause old people get tired and cant do much.maybe you can try getting him up in to shape ask to go swimming then he will take you.my mom said that you need to let out your words which means say what you need to say cuz he has anger. then dont yell. say it anoust!and if he tears say it alright always make sure she talks.