Final answer:
Crossed arms typically convey irritation or a closed off attitude, which is part of culturally learned nonverbal communication. It might vary by context but generally doesn't indicate listening, helpfulness, or agreement.
Step-by-step explanation:
What do crossed arms convey as a means of communication? Crossed arms can often be perceived as a nonverbal communication gesture that conveys a defensive or closed off attitude. It can be interpreted as a person being irritated, uncomfortable, or not open to further dialogue. This form of body language is part of how people communicate symbolically, and much like verbal language, is culturally learned. However, the interpretation of crossed arms, as with many nonverbal cues, can vary depending on cultural context and the specifics of the situation.
While crossed arms might sometimes be misinterpreted as relaxation or self-comfort, in a conversational context, it is less likely to be seen as an indication of listening, helpfulness, or agreement. Therefore, the most suitable choice among the provided options for what crossed arms convey would be 'I'm irritated with you.'