Concept:The underlined vowel sound in “Money” is the short central vowel /ʌ/.Explanation:The word “Money” is pronounced /ˈmʌn.i/.The underlined “o” is pronounced with the sound /ʌ/.Among the options, “son” is pronounced /sʌn/ and contains the same vowel sound /ʌ/.The other options do not share this vowel sound.Therefore, “son” matches the vowel sound in “Money”.Answer:B. son