Concept:The phonetic symbol /^/ represents the vowel sound /ʌ/, as in "cup" or "tough".Explanation:Check the sound in each option.A. "bush" is pronounced /bʊʃ/ — it has the /ʊ/ sound.B. "tough" is pronounced /tʌf/ — it contains the /ʌ/ sound.C. "cop" is pronounced /kɒp/ — it has the /ɒ/ sound.D. "loot" is pronounced /luːt/ — it has the /uː/ sound.Only "tough" contains the required /ʌ/ sound.Answer:B. tough