Final answer:
Sport Psychology is the branch of psychology focused on enhancing athletic performance and enjoyment, encompassing motivation, performance anxiety, and general mental well-being in athletes and others in high-pressure roles.
Step-by-step explanation:
Sport Psychology
The type of psychology that applies principles to improve athletic performance and enjoyment of athletic participation is sports psychology. Sports psychologists work with athletes of all levels to enhance performance, cope with the pressure of competition, recover from injuries, and enjoy the sport. They focus on motivation, performance anxiety, and the overall mental and emotional well-being of athletes. Additionally, sports psychology is not limited to athletes; it can also include other domains such as military operations and performing arts where mental and physical performance are critical under demanding conditions.
Regarding the multiple-choice question presented, the correct answer would be D. Sport Psychology.