Which action involves passing along information from one party to another?

The correct choice, relay, is significant because it specifically refers to the act of passing information from one party to another. In various contexts, including communications and law enforcement scenarios, relaying information ensures that relevant data, instructions, or messages are shared with the appropriate individuals or entities. This is crucial in maintaining effective communication and ensuring that all parties are informed and able to act on the information provided.

In contrast, receiving well typically pertains to how information is received or understood by a party and does not encompass the act of passing it on. Busy refers to a state in which a communication line or channel is occupied and does not imply any action related to transferring information. Stop transmitting indicates the end of a communication session rather than the process of sharing information with another party. Therefore, relay is the term that accurately captures the action of transferring information.