Concept:Identify the vowel sound in the underlined part of the given word and match it with the same vowel sound in one option.Explanation:The word "stew" is pronounced as /stju:/.The underlined letters "ew" give the long vowel sound /u:/.Now check the options:"slow" has the sound / oh /."good" has the sound /u/."blue" is pronounced as /blu:/, with the same long vowel sound /u:/."gnaw" has the sound /o:/.Hence, "blue" shares the same vowel sound as "stew".Answer:C. blue