Multiple choice Directions: Click the option that substitutes the given word/phrase. Part of a circle ark arc aye eye Reveal answer Fill a bubble to check yourself B Correct answer Explanation An 'arc' is a part of a circle's circumference - any portion of the curve that makes up a circle. The other options are unrelated: 'ark' is a boat (biblical), 'aye' means yes, and 'eye' is the organ of vision.