Final answer:
In 'Bernice Bobs Her Hair' by F. Scott Fitzgerald, Marjorie Harvey helps her cousin Mehri become more popular by advising her on appearance and behavior.
Step-by-step explanation:
In the book 'Bernice Bobs Her Hair' by F. Scott Fitzgerald, Marjorie Harvey helps her cousin Mehitable (Mehri) to become more popular. Marjorie advises Mehri to change her appearance, hairstyles, and ways of behaving to conform to the expectations of the popular girls.
Marjorie acts as a mentor and guides Mehri through the process of transforming her image. Throughout the story, Marjorie provides guidance and support to help Mehri navigate the social dynamics of their high school.