The answer in the space provided is madrigal, this has been
originated from Italy and England and they were considered to be the most
advance secular vocal form during the period of renaissance compared to other
secular vocal forms during this period.
The best answer here would be pencil.
Artists use pencil to make sketches and create studies. They then use these sketches and studies to create their final larger piece. They use pencil because it's quick, can be corrected, lightweight and easy to use. Before pencils artists would make charcoal drawings but once we had pencils it made sense to use them as they aren't messy like charcoal.
In the mirrored ball, the objects are varying sizes, which allows certain objects or subjects (ex: man) to appear closer and others farther away (window), creating depth and form.
