Which one of the following terms is most closely associated with interjections?
a. action
b. emotion
c. qualification
d. description

Interjection is one of the many parts of speech that clearly expresses the feelings or emotions of the subject or the actor. Interjections can be words or phrases that may be used alone or placed within, before or after a sentence. It is usually followed by punctuation marks, most commonly an exclamation point. The words ahem, ahh, eh, ewww, oops, jeezzz, phew are examples of interjections. Therefore, among the choices presented above, interjections  are closely related or associated with emotions.