You had a challenging situation as a young adult who could see changes in a friend and recognize his need for professional help. You faced an obstacle in getting that help for him becausae his family was not helpful in getting him the help he needed. As a friend who recognized his suffering, you felt a need to get help for him.
Seems like a challenge for you to get help for a friend who was having mental health problems. I think that it is responsive to the prompt.
I'd focus on how you approched the challenge, what the outcome was, what you learned and how you would do things if faced with a similar situation in the future.