Final answer:
The life issue that increases in importance as couples reach their 60s is health and retirement planning.
Step-by-step explanation:
The life issue that tends to increase in importance as couples reach their 60s is Health and retirement planning. As individuals age, they become more concerned about their health and making sure they have enough savings and plans in place for their retirement years.
This includes considerations such as healthcare expenses, long-term care, and financial stability in retirement.