set up security questions
How to set up or reset security questions
MacBook Air 11″, macOS 10.15
Question marked as
See -> If you forgot the answers to your Apple ID security questions - Apple Support
Note that if you use AppleID 2 factor authentication (or even the older 2 step verification) then there are no security questions to setup or reset. Security questions don’t exist when using a 2 factor login with your AppleID.