Why are thread feeders important?

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? "

Which style of polyphony uses a borrowed chant and arranges several new melodies and texts above and unrelated to the chant?

What are the colors that cannot be made by mixing other colors