Final answer:
The central idea revealed by the contrast between Stefan Holm and Donald Thomas is the different paths to success in high jumping.
Step-by-step explanation:
The central idea revealed by the contrast between Stefan Holm and Donald Thomas is the different paths to success in high jumping. Stefan Holm achieved success through hard work, dedication, and consistent improvement over time. He focused on perfecting his technique and building a strong foundation. On the other hand, Donald Thomas achieved success through natural talent and raw athleticism. He had a natural ability to jump high but lacked the discipline and consistency of Holm.