How was polyphony most often performed?

Polyphony is often performed to the text of a song.

Explanation:

The inscription is believed to date back to the start of the 10th century and is the setting of a short chant dedicated to Boniface, patron Saint of Germany. It is the earliest practical example of a piece of polyphonic music – the term given to music that combines more than one independent melody – ever discovered.

lines and shapes are a part of the visual elements which can be played with and used to create a mood or feeling in a composition.

some of the other elements include the pattern, color, tone and texture. all these elements serve together as the construction blocks which are used by the artists to create artwork.

lines are used to form drawings and different shapes are formed when these lines are used in certain lengths or angles. so the artist can play with these elements of art to create and express different moods, thus conveying different  meanings.

that is true. stravinsky's rite of spring ballet is a prime example of with its focus on prehistoric culture, costumes, and dancing.