Answer:
The selection that best shows the main idea of the speech is "When it comes to body image and feelings of self-consciousness, almost everyone experiences moments in which they are self-conscious about their bodies. But there are ways to support yourself and work on building a better body image."
Step-by-step explanation:
The selection that best shows the main idea includes a general view of the fear of people about showing their "imperfect" bodies to others and how society forces us to idealize some hard to acquire standards, the other selections are details that explain and extend the general idea of self-acceptance.