Which part of speech can act as independently complete sentence:

🧠 Explanation:

An interjection can act as an independently complete sentence, expressing emotion. For English students, this highlights grammar, making it a key topic for studying linguistic expression, sentence structure, and communication. Interjections stand alone. Understanding this improves writing precision. It’s essential for mastering grammar in communication. Studying interjections offers insights into how language conveys emotion, crucial for English, journalism, and communication.