_____ allows the receiver to show the sender that she or he is paying attention and clearly understands the messages being sent.

A) Encoding
B) Decoding
C) Modulation
D) Feedback

Feedback is the process of the receiver providing information to the sender about how the message was received and understood. It allows the receiver to show the sender that they are paying attention and comprehending the message being sent. Feedback can be verbal or nonverbal and is an essential component of effective communication. A and B refer to the processes of encoding and decoding, respectively, which occur during the transmission and reception of messages. Modulation refers to the process of varying a carrier signal to convey information, often used in radio and telecommunications.