When a musical idea is restated retaining some original elements but aletering others it is called?

How did you find the artist of the mystery art? what type of paint do you think was used? (site 1)

First to answer will be the brainliest i need the answer asap

What is the definition of aesthetics? a. the material or materials used by an artist to create artwork b. the branch of philosophy that deals with beauty and how it is expressed and appreciated c. the organization or arrangement of different elements within a work of art o d. the school of thought dedicated to examining the question, "what is art? "