Answer: shaping
Explanation:
Shaping is a method of reinforcement with closer and closer approximations that lead to the desired behaviour. It means that you reinforce certain behaviours that are every time much closer and to the target behaviour.
a because they are taking away peoples jobs
The opera as a form of entertainment was largely limited to people with high incomes.
Opera originated in Italy at the end of the 16th century and it is a form of theatre in which music has a leading role and the parts are taken by singers. The audience wer weatlhy people from the high society.
