What is an interjection?

An interjection is indeed a word that expresses strong emotion. These words convey feelings or reactions and are often used to exclaim or emphasize a point in conversation. Examples include "Wow!", "Oh!", "Yikes!", and "Hooray!". Interjections stand out because they can convey feelings on their own and are usually followed by punctuation, such as an exclamation mark. This part of speech is unique compared to others, as it does not necessarily fit into the sentence structure but adds an emotional dimension to communication.

The other options represent different parts of speech: the first refers to conjunctions, which connect words, phrases, or clauses; the third describes adjectives, which provide more information about nouns; and the fourth relates to interrogative terms that begin questions. Each of these serves a specific function in language but does not align with the definition of interjections.