Answer:
The influence of elders.
Explanation:
The teenager's aunt shown in the above question reported an experience she had due to cancer, which was influenced by her unprotected sun exposure. This teenager wants to sunbathe because she believes she needs to be tanned to be attractive, but if her aunt's experience is enough to make her give up sunning, or at least expose herself with the necessary protection, means that the influence of someone older, in this case the girl's aunt, was more important to her than the belief that who is tanned is more attractive.
