Which concept explains the communication through the use of tone and sound quality?

The correct choice is focused on the concept of paralanguage, which refers to the non-verbal elements that accompany speech and convey meaning. This includes aspects such as tone, pitch, loudness, and quality of voice, all of which significantly affect the interpretation of verbal communication. For instance, the way something is said can convey sarcasm, seriousness, or enthusiasm, which are essential for understanding the speaker's intent.

While intonation, which is also mentioned in the options, specifically deals with the rise and fall of voice pitch, paralanguage encompasses a broader range of auditory cues that contribute to communication. Chronemics relates to the use of time in communication and not sound, and proxemics pertains to personal space and physical distance in interactions. Thus, understanding paralanguage is crucial for effective communication within the context of code enforcement and other fields.