Identify the synonym commonly used for melody

In the Second Style Room of the Masks in the House of Augustus, the mural painters used all of the following techniques to suggest illusionistic space EXCEPT

A) ?atmospheric perspective. B) ?linear perspective. C) ?representation of cast shadows from a theoretical source of light. D) ?painting the walls to resemble marble revetment.

The name of the opening that lets light into any camera is called the ________.

Fill in the blank(s) with the appropriate word(s).