Final answer:
The central idea of "The Sports Gene" is that individuals born with certain physical traits have an advantage in sports. The correct answer is option 4.
Step-by-step explanation:
The central idea of "The Sports Gene" could be said to be that if you are born with certain physical traits, you will have an advantage in sports. The book explores the role of genetics in athletic performance, highlighting how certain genetic factors can contribute to an individual's success in sports. It emphasizes that while hard work and practice are important, genetics can play a significant role in determining one's athletic abilities.