Concept:The word "heir" has a silent "h" and is pronounced the same as "air".Explanation:"Heir" is pronounced /ɛə/ or /eər/.Option A "here" is /hɪə/, so it is different.Option B "hail" is /heɪl/, so it is different.Option C "air" is /ɛə/ or /eər/, so it matches "heir".Option D "hew" is /hjuː/, so it is different.Answer:C. air