After a few weeks in school, all students know that they should raise their hand if they want to speak in class. this is an example of what aspect of communication?

Nonverbal communication.

Nonverbal communication is the exchange of information through the use of cues instead of words. In this case, by the cue the student gives (raising his hand), the teacher know that he wants to speak.

balearic sea - is a body of water in the mediterranean sea around the balearic islands. baltic sea - is a mediterranean sea of the atlantic which is enclosed by scandinavian and baltic countries. barents sea - is a marginal sea in the artic ocean located off the northern coast of norway and russia.