Medium is the means of communication. Message is the information that the sender wants to transmit. Noise is anything that interferes with the communication. Nonverbal communication includes images, actions and behaviors used to transmit messages. Receiver is the person or group for whom the communication effort is intended.
Sender initiates the communication process.
Accountability is answering for the result of one's actions or omissions. Authority is the formal and legitimate right to make decisions, give orders, and allocate resources. Delegation is the downward transfer of formal authority from superior to subordinate. Responsibility is the obligation to do assigned tasks.