What is the defining characteristic of two-way communication?

Two-way communication is characterized by the active participation of both the sender and the receiver, creating a dialogue where feedback is exchanged. This interaction allows the receiver to respond, ask questions, or provide their own insights, which not only clarifies the original message but also enhances understanding and engagement. This characteristic is essential for effective communication since it promotes a collaborative environment where ideas can be explored and refined through reciprocal dialogue.

In contrast, the other options emphasize scenarios that do not represent the essence of two-way communication. The first option suggests only the sender's involvement, which negates the concept of feedback. The second option asserts that no feedback is provided, which is contrary to the interaction necessary for two-way communication. The last option restricts the medium of communication to writing, while two-way communication can occur through various formats, including verbal conversations and digital interactions. Thus, the correct answer highlights the fundamental nature of two-way communication as an interactive process involving both parties.