Multiple choice Directions: Choose the correct part of speech for the given word. Key verb noun adjective adverb preposition Reveal answer Fill a bubble to check yourself B Correct answer Explanation The correct answer is 'noun' because 'key' primarily names a thing - a small metal instrument for opening locks. While 'key' can be used as an adjective ('key witness') or verb ('key in data'), its primary and most common meaning is as a noun.