I don't know what the other two are (bonds and flaws/custom races)
(I copied this from
dndbeyond.com, it's part of the character creation in the Player's Handbook for 5e)
Bonds
Bonds might answer any of these questions: Whom do you care most about? To what place do you feel a special connection? What is your most treasured possession?
Your bonds might be tied to your class, your background, your race, or some other aspect of your character’s history or personality. You might also gain new bonds over the course of your adventures.
Flaws
Finally, choose a flaw for your character. Your character’s flaw represents some vice, compulsion, fear, or weakness—in particular, anything that someone else could exploit to bring you to ruin or cause you to act against your best interests. More significant than negative personality traits, a flaw might answer any of these questions: What enrages you? What’s the one person, concept, or event that you are terrified of? What are your vices?
