4. what are five actions you should do to care for your camera?

Adding to the one above,
Keep food or drinks away from the camera

The phrase that defines "chiasmus" best is, the use of repetition in opposite order with the focus on the structure of the phrasing. it is a rhetorical and literary figure wherein two or more clauses are balanced against each other through the reversal of their structures. the term chiasmus is from a latin word from greek meaning "crossing".