Amy informs her employees that they can offer any constructive criticism regarding her leadership style by placing anonymous notes in her mailbox. this is an example of

This is an example of "Upward Communication".

Upward Communication is the procedure of data going out of the lower levels of a chain of hierarchy to the upper levels. This kind of correspondence is winding up more prevalent in associations as conventional types of correspondence are ending up less prominent. This encourages workers to express their necessities, thoughts, and emotions to the upper management class.

united states government;

b. the american revolution