Music used in between two scenes is referred to as . Transitional Music
Sound Effects
Framing Music
Ambient Sound

Idk but maybe a camera?

The "maple leaf rag" (copyright registered on september 18, 1899)[1] is an early ragtime musical composition for piano composed by scott joplin. it was one of joplin's early works, and became the model for ragtime compositions by subsequent composers. it is one of the most famous of all ragtime pieces.[2] as a result joplin was called the "king of ragtime". the piece gave joplin a steady if unspectacular income for the rest of his life.

Well they refer to anime girls

Analysis of da vinci's vitruvian man. another of da vinci's most famous works is that of the vitruvian man, created around 1490. the official title of the drawing is “le proporzioni del corpo umano secondo vitruvio,” or “the proportions of the human body according to vitruvius.”