Concept:The underlined part is pronounced as the voiceless consonant /s/.Explanation:"theme" begins with /θ/, which is different from /s/."keen" begins with /k/, not /s/."psyche" has a silent "p," so it starts with the /s/ sound."prize" has a voiced /z/ sound, not /s/.So only "psyche" matches the target consonant sound.Answer:C. psyche