One of the most important activities to maintain good health as one ages is

A) spending time with one's partner.
B) exercise.
C) spending time with children.
D) watching television game shows.

Exercise is important to maintain physical and mental health as one ages. It can improve cardiovascular health, muscle strength, balance, and cognitive function. Spending time with loved ones and engaging in enjoyable activities such as watching television can also be beneficial, but exercise is crucial for overall health.