Im not quite sure what you're saying
Especially in the days before audio recording and playback, music was often written out as a means of preserving and communicating it. To do this, a system of notation was developed that gives musicians the information they need to play music as the composer intended it.
(Hope it helps :) )
Answer:
A classic example of a closed-class society without social mobility is the Hindu society under the caste system. ... In a closed-class society there is pronounced tendencies toward radicalism and revolution. A closed-class society is one in which position is fixed at birth and cannot be changed by individual achievement.
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