I think the correct answer from the choices listed above is the second option. It is the Industrial Revolution that took place during the Classical Era that improved basically every area of life. <span>The </span>Industrial Revolution<span> made machine-based manufacturing more common, and increased the population and average income. Many jobs were available which raise the status of most people.</span>
The answer to the question presented above would be 'equal temperament'. The concept of equal temperament divide the octave into 12 tones. This helps avoid the harmonies to be deemed unpleasant when the music is played.
Musical Notes are like a second language and because musicians learned that second language they have unlocked a new part of there brain for extra learning.
