The process of adapting well in the face of adversity, trauma, tragedy, threats or even significant sources of stress is known as *
Assertive
Pessimistic
Resilence
ptimistic

C

Explanation:

Resilience is the process of adapting well in the face of adversity, trauma, tragedy, threats or significant sources of stress — such as family and relationship problems, serious health problems or workplace and financial stressors. It means "bouncing back" from difficult experiences.

it should be