What quality do you think is most necessary for survival? And for happiness?

Adaptability for sure, creativity to make do with what you have and to solve other problems, a tough attitude, a sense of humor so you don’t get depressed, good health is important too

A grateful heart is always adaptive because it accepts everything that comes in its way. So great answer.

Most necessary for survival for the long term is healthy habits while for short term periods of change it is adaptability for sure.
For happiness, gratitude, appreciation, awareness of the beauty.

Healthy bonds and good self-esteem

Adapt to any situation and be good as you can be

Beautiful question 😊 I'd say honesty for the long run and communication

Both are different.

Survival => social skills
Happiness => spirituality