Concept:The letter “s” can be pronounced as /s/ or /z/.In the word “easy,” the underlined “s” represents the voiced sound /z/.Explanation:The word “easy” is pronounced as /ˈiː.zi/.When you say it, the underlined “s” makes a buzzing /z/ sound, not a hissing /s/ sound.Now compare the four options by their final consonant sound.Option A: “loss” is pronounced /lɒs/ and ends with the sound /s/.Option B: “phase” is pronounced /feɪz/ and its final “s” gives the sound /z/.Option C: “curse” is pronounced /kɜːs/ and ends with /s/.Option D: “last” is pronounced /lɑːst/ and also ends with /s/.Only option B has the same consonant sound /z/ as the “s” in “easy.”Answer:B. phase