Answer:
Mate, this seems like a law-based poem, and I live for it. Sadly, I cannot answer the question.
An audience.
This is a minimalist view, but it works as an audience can be considered to be an essential element of theatre.
D. Preformance art focuses on both sight and sound
A unit of measurement that is standard, and has been used by artists (including myself) to accurately create the proportions of the human figure
