Concept:The underlined letters “th” in “the” are pronounced as the voiced consonant sound /ð/.Explanation:The word “though” begins with the same voiced /ð/ sound.The word “think” contains the voiceless /θ/ sound, which is not the same.The words “sniffed” and “listen” do not contain the /ð/ sound.Hence, only “though” matches the consonant sound of the underlined letters.Answer:B. though