Concept:The underlined letters represent the consonant sound /ʃ/, as in “shadow”.Explanation:The word “shadow” is pronounced /ˈʃædəʊ/, so its underlined sound is /ʃ/.Now check each option for the same sound.“treasure” has /ˈtrɛʒər/, with a /zh/ sound, not /ʃ/.“century” has /ˈsɛntʃəri/, with a /tʃ/ sound, not /ʃ/.“miner” has /minor/, with no /ʃ/ sound.“trash” is /trash/, and its final sound is /ʃ/, matching “shadow”.Answer:D. trash