If a mount takes the Disengage action does the rider provoke opportunity attacks?

Aaarakocra Monk Unarmored Movement

Does a fighter with an increased crit range (say 19-20) always hit on a 19?

If a player meets a wild wolf and tries to calm it, would you say that’s a Wisdom check?

Paladin got an Attack of Opportunity and wanted to blast with a Smite? I said it’s a reaction and it only one melee attack

Would an Artificer’s steel defender stop working if it stepped in antimagic field?