during discussion, mary cannot focus because she is hungry. what kind of interference does being hungry referred to?

Being hungry in this situation is an example of internal interference (also called internal noise or physiological noise) in the communication process.

Why it’s internal interference

• The distraction comes from inside Mary’s body (her hunger), not from the environment around her.
• This internal state interferes with her ability to pay attention , process the message, and focus on the discussion, which is exactly what “internal interference/noise” means in communication models.

You might also see this described more specifically as physiological noise (a type of internal interference caused by bodily conditions like hunger, fatigue, or illness) in some textbooks.

So, the best answer: Internal interference (physiological noise).

TL;DR:
Mary’s hunger is internal interference (physiological noise) because it comes from within her and disrupts her focus on the message.

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