Answer: Yerkes-Dodson law
Explanation:
Yerkes-Dodson law is the concept that defines about relationship between performance and arousal.Impact of arousal can influence performance of the person.This process work till certain limit .
According to the question,Haruki's concept of dancing is describing about Yerkes-Dodson law as arousal created by motivation due to presence incidence and other factors that tends to increase performance of Haruki. Arousal decrease when less audience is present of he is performing alone that degrade his performance.