Concept:Identify the vowel sound in the underlined part of "buy" and match it to the same sound in one of the options.Explanation:The underlined letters "uy" in "buy" produce the sound /aɪ/.Now check each option:• supper: /ʌ/• bang: /æ/• coy: /ɔɪ/• tie: /aɪ/The word "tie" has the same vowel sound as "buy".Answer:D. tie