Shonda was sitting in a crowded room that was very warm. This was making it difficult for her to listen to the speaker's message. What type of noise was interfering with Shonda's message reception?

External noise.

Explanation:

While internal noise happens in the mind of the speaker or the receiver in an interaction, external noise happens outside, in their surroundings. External noise can be quite distracting, preventing effective communication from happening. Examples of external noises are: people talking, car horns, loud music. In Shonda's case, the room is crowded. Even if people are talking in low voices, there are so many of them that the noise can seem quite overwhelming.