Concept:Identify the option that has the same vowel sound as the underlined letters in the given word.Explanation:In the word alert, the underlined letters er are pronounced as /ɜː/.The word pearl is pronounced /pɜːl/, so it has the same vowel sound /ɜː/.The word percent has the sound /ə/ or /e/, not /ɜː/.The word heart has the sound /ɑː/, which is different.The word check has the sound /e/, which is also different.Therefore, the correct match is pearl.Answer:A. pearl