Concept:The word "coarse" has the vowel sound /ɔː/, so we must find the option with the identical vowel sound.Explanation:"coarse" is pronounced /kɔːs/.The vowel sound is /ɔː/.Now check each option:A. coax is pronounced /kəʊks/ – vowel sound /əʊ/.B. chore is pronounced /tʃɔː/ – vowel sound /ɔː/.C. road is pronounced /rəʊd/ – vowel sound /əʊ/.D. rod is pronounced /rɒd/ – vowel sound /ɒ/.Only "chore" has the same vowel sound /ɔː/ as "coarse".Answer:B. chore