Why did caravaggio use the technique of foreshortening

The phrase to every action there is an equal and opposite reaction is

Which of the following is not a characteristic of bebop? reharmonization and chord substitution common emphasis on improvised solos new repertoire created from jazz standards using new melodies general attitude of restraint, tranquility

I’m a paragraph of no less than 125 words, explain the single most important factor involved in advancing american classical music in the twentieth century.