Answer:
The common component that Martin Seligman and Angela Duckworth share while enlisting their ingredients for happiness and grit is resilience.
Step-by-step explanation:
Martin Seligman wrote a book titled 'Authentic Happiness' in which he shared the ingredients of being happy. In his book, he wrote that happiness is not a mere product of good times but true happiness comes from finding one's own strength. Happiness is not situation based and is gained with resilience.
The term resilience can be defined as one's ability to overcome difficuluties, it's one's ability to come back into shape after facing adversity or toughness.
Angela Duckworth is most celebrated for her work on grit. In her work, she suggested that key to grit is resilience. It is not related to IQ, EQ, and so on but the ability of resilience.
So, the common component that Martin Seligman and Angela Duckworth shares is resilience.