Final answer:
Nonverbal communication consists of body language signals like gestures, paralanguage, and dressing manner, which vary across cultures and can convey powerful messages without words.
Step-by-step explanation:
Nonverbal communication cues that send powerful messages through gestures, vocal qualities, manner of dress, and grooming are known as body language or non-verbal communication. Key aspects of non-verbal communication include paralanguage, gestural modes, and cultural considerations.
Paralanguage involves the non-word aspects of speech, such as tone and accent, which convey meaning beyond the words themselves. Gestural communication includes all kinds of body language, such as movement, facial expressions, and posture, which can indicate a person's feelings or intentions without the use of words. Cultural norms influence the interpretation and appropriate use of these nonverbal cues, which may vary significantly across different cultures.