Which factors are least likely to influence body image among teenagers?

The influence of positive reinforcement from parents on body image among teenagers can be considered less impactful compared to the other factors listed. While parental support and encouragement can contribute positively to a teenager's self-esteem and body image, adolescence is a developmental stage where peer interactions and societal influences become increasingly significant.

Teenagers are often more susceptible to looking to their peers for validation. Comparisons with friends and classmates can have a strong effect on how they perceive their own bodies. Media portrayals, such as advertisements and social media images, frequently set unrealistic beauty standards that can lead to dissatisfaction with one's body. Similarly, public figures and celebrities can greatly impact body image through their portrayal in the media and the standards they represent, making these influences likely more potent than parental reinforcement alone.

In essence, while positive reinforcement from parents is valuable, it generally does not outweigh the pervasive effects of peer comparisons, media portrayals, and the influence of celebrities on body image during adolescence.