Observational learning is very much what learning how to dance is.
Vestibular sense can be a great problem for someone that wants to learn dancing because it is the sense that has to do with maintaining balance and posture.
The correct answer is:
Socialism, Democracy, and Nationalism.
The Three Principles of the People were the ideological foundation of the political program of Sun Yat-sen, Chinese Nationalist leader (1866–1925).
These principles were first expressed as slogans for the United League, Sun’s radical student group and one of the main organizations behind the 1911 Republican Revolution, which put an end to the Qing dynasty rule of China.