The answer is VALUE hope this help:)
The answer is focal point. the focal point is the part of any work your eyes are drawn to first, after that discovery, the work automatically draws your eyes to other aspects of art, like telling a story in a visual sense.
Ummmmm... A microphone is an example of a device that you can sing, and sometimes put autotune... I dunno?
:D
The title of the artwork - Portrait of Lisa Gherardini
Name of artist - Leonardo da Vinci
Era - Renaissance
Hopefully this is correct :)