Concept:Identify the word whose vowel sound matches the sound represented by the underlined letter(s).
Explanation:The underlined letters represent the vowel sound /ɔː/.
Option A: "port" is pronounced /pɔːt/, so it contains the matching /ɔː/ sound.
Option B: "cook" is pronounced /kʊk/, and its vowel sound is /ʊ/, which does not match /ɔː/.
Option C: "pal" is pronounced /pæl/, and its vowel sound is /æ/, which does not match /ɔː/.
Option D: "lout" is pronounced /laʊt/, and its vowel sound is /aʊ/, which does not match /ɔː/.
Answer:A. port