Answer:
Resilience
Explanation:
In psychology, the concept of resilience refers to the ability to cope and face trauma, adverse situations or negative things that happen in one's own life and not only "bounce back" from these situations but also experiencing a personal growth from them.
In this example, Sarah lost her job (negative situation which is a source of stress), however she showed tremendous will and courage to find new work opportunities and she even acquired new skills and found a job. We can see that she didn't just bounce back from adversity but actually learned new skills (personal growth) derived from it. Thus, this illustrates Sarah's resilience.