Phil is running late for his saturday night shift at the factory. when his spouse asks him where he's going, he adopts a facial expression of frustration and says, exasperatedly, "we have to pull extra shifts since shawn got fired." which function of nonverbal communication is phil using?

The scenario in which Phil  adopts a facial expression of frustration and says, exasperatedly, "we have to pull extra shifts since Shawn got fired." means that Phil is using  the complementing function of nonverbal communication.
The complementing function of nonverbal communication ensures all speech is paralleled by non-verbal communication that aligns with the what is being said.

Communism best describes china's government