Although Melissa suffered intensely from the unexpected death of her young husband, her personal strength and optimistic outlook on life enabled her to effectively cope with her loss and live a productive and meaningful life. Melissa most clearly illustrated:.

Melissa most clearly illustrated resilience.

Explanation:

Resilience is a psychological term that describes an individual's ability to bounce back from a challenging experience such as setbacks, challenges, failures and disappointments,  

Melissa is resilient because she did effectively cope with the loss of her young husband (challenging experience)  and went back (bounced back) to living a live a meaningful and productive life.

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