It’s called the tonic, it’s considered the root or base note for whatever scale you’re using
The corporal works of mercy include the following:
feeding the hungry
giving shelter to the homeless
giving clothes to the naked
visiting those who are sick
visiting those who are imprisoned
burying the dead
giving alms to those who are poor
Spiritual works of mercy include the following:
instructing
advising
consoling
comforting
forgiving
bearing wrongs patiently
