Final answer:
The author develops the idea of leisure activities becoming more sedentary the least in this article about adolescents and screen time.
Step-by-step explanation:
In this article about adolescents and screen time, the author develops the idea of leisure activities becoming more sedentary, such as computer games, web surfing, and television viewing, the least.
This idea is mentioned briefly and is not elaborated on or discussed in depth compared to the other ideas presented in the article.
The focus of the article is more on the adverse consequences of reduced play and the impact of technology and media on adolescents' behavior and relationships.