Final answer:
TRICARE is for active-duty and retired military and their families; VHA provides healthcare services to veterans; CHAMPVA is for the families of disabled or deceased veterans not qualified for TRICARE.
Step-by-step explanation:
The TRICARE program is designed for active-duty and retired members of the military, as well as their families, which acts as a health insurance provider for these groups. The Veterans Health Administration (VHA) oversees the services provided to U.S. veterans, including health care services, and is generally used by those who have served in the military but are no longer active-duty. Lastly, the Civilian Health and Medical Program of the Department of Veterans Affairs (CHAMPVA) is a program for the family members of disabled or deceased veterans who do not qualify for TRICARE.