Concept:The underlined letter “a” in “dance” has a specific vowel sound, so choose the word whose vowel sound matches it.Explanation:In standard British pronunciation, the “a” in “dance” is pronounced as /ɑː/.Now examine the vowel sounds of the given options.“Aunt” is pronounced as /ɑːnt/, so it shares the same vowel sound with “dance”.“Dunce” has a short /ʌ/ sound, “friend” has /e/, and “mace” has /eɪ/.Therefore, only “aunt” matches the underlined vowel sound.Answer:B. aunt