Concept:Identify the word whose vowel sound matches the underlined sound in “there.”Explanation:The word “there” is pronounced as /ðeə/, where the underlined letters “ere” produce the vowel sound /eə/.The word “their” is also pronounced as /ðeə/, so it has the same vowel sound.The other options have different vowel sounds: “fear” has /ɪə/, “ear” has /ɪə/, and “peer” has /ɪə/.Therefore, the correct choice is option A.Answer:A. their