Final answer:
The central idea of the section about Annie Turnbo Malone in 'The Secrets of Their Success' is the impact and success of African American women in the early 20th century.
Step-by-step explanation:
The central idea of the section about Annie Turnbo Malone in 'The Secrets of Their Success' is the impact and success of African American women in the early 20th century. Annie Turnbo Malone was a successful entrepreneur and philanthropist who founded her own beauty products business. She played a significant role in empowering African American women by creating job opportunities and promoting entrepreneurship.