Answer:
a medical-alert bracelet that informs first responders of a fall or an emergency.
Step-by-step explanation:
we can rule the others out because a refrigerator isn't going to help her from the nursing home, a wheelchair is helpful but the fact that they mentioned power steering doesn't fit well with this question, and a fitness tracker is good for health purposes but won't get her help.
i am sorry if my explanation doesn't make sense, but i am sure this is the right answer!