Final answer:
Cultures can be a barrier to communication as they can affect language, conversational etiquette, personal space, and nonverbal cues.
Step-by-step explanation:
A barrier to communication is cultures. Cultural differences can affect language, conversational etiquette, personal space, and nonverbal cues. For example, while some cultures value constant eye contact during a conversation, others may consider it inappropriate or uncomfortable. Understanding and respecting cultural differences is essential for effective communication.