Jessica spends a lot of time thinking about the choices she has made in her life and the events she has witnessed. she is adjusting to decreasing strength and health, and she has made several lifestyle changes as a result. jessica is most likely in the period of development.

late adulthood

Explanation:

It is very clear from the question that Jessica is living in her late adulthood stage of her life.

It is mentioned that Jessica is losing strength and is deteriorating in health. She is becoming weak day by day and is losing hope. As a result, she has made several changes in her life style according to her age.

She is reflecting back her past decisions and actions taken during her course of life and in wondering whether she had made right or wrong decisions. She also sometimes thinks about the various events that she had witnessed in her past.

Thus, it is clear that Jessica is most likely in her late adulthood stage of development.