One characteristic of this excerpt that suggests it might be from the baroque period is:

One characteristic of this excerpt that suggests it might be from the Baroque Period is that it contrasts a group of instruments with a solo instrument.
This was a common habit in music during the Baroque era which spanned the entire 17th and a part of the 18th centuries. These types of musical contrasts made Baroque great and an artistically important period of human history. In the following eras, music changed somewhat.

The term collage was coined by both  georges braque  and  pablo picasso  in the beginning of the 20th century when collage became a distinctive part of modern art.hope this sorry if there wasn't more of an explanation!

This would be tesserae.