Harmony Happiness

Happiness is the result of the combination of which three factors?
Which of these five are the three essential elements necessary for a happy person: a) love b) intellect c) devotion d) harmony e) beauty. (It does not have all five?) Mmm! I tend to choose love and devotion. But the third is a bit difficult. Could someone convince me?
Love Common Sense of compassion for others and yourself
HARMONY GRASS-HAPPINESS IS TOY-SHAPED