Final answer:
The term that refers to anything that blocks or changes the source’s intended meaning of messages is Noise. Noise can include physical or psychological disturbances. Feedback, however, is the response to a message, which can influence the original message but is not the correct answer to what blocks it.
Step-by-step explanation:
The term that refers to anything that blocks or changes the source’s intended meaning of the messages is Noise. In the context of communication, noise can be any disturbance that interferes with the transmission of a message, making the message less clear to the receiver. This could be physical noise, like the sound of traffic, or psychological noise, such as preconceived notions that lead to misconceptions about the message’s content.
Feedback, on the other hand, is the response of a system when a change is made that itself influences the change. This can either counteract the change, which is known as negative feedback, or amplify it, which is referred to as positive feedback. While feedback is an essential component of effective communication, it is not what blocks or alters the intended message but rather a reaction to the message sent.