An example of a part of speech that demonstrates emotion or feeling is an ____________.

The correct answer is indeed interjection because interjections are words or phrases that express strong emotions or feelings such as surprise, joy, anger, or excitement. Examples of interjections include words like "wow," "ouch," and "yay." They serve to convey an emotional response without necessarily fitting into the traditional structure of sentences, making them unique in how they express feelings directly.

In contrast, adverbs modify verbs, adjectives, or other adverbs and are more focused on describing how actions are performed rather than expressing emotion themselves. Nouns represent people, places, things, or ideas but do not inherently convey feelings. Verbs denote actions or states of being and can convey emotions indirectly when paired with other words, but they are not specifically designated for expressing emotion on their own. This distinction emphasizes why interjections are the part of speech that specifically demonstrates emotion or feeling.