Выбрать верный вариант (who| which| that).
I’ve got a brother (who| which| that) I can rely on.
I’ve got a friend (who| which| that) I’m never bored with.
My friend is a person (who| which| that) is always there for me.
Friendship is a feeling (who| which| that) can last forever.
My parents are people (who| which| that) I can turn to for help.