Concept:The word "short" contains the long vowel sound /O:/.Explanation:"short" is pronounced /short/.The underlined letters represent the vowel sound /o:/.Check each option:A. "but" is /b∧t/ — different vowel sound.B. "shoot" is /shu:t/ — different vowel sound.C. "spot" is /spot/ — different vowel sound.D. "jaw" is /dzˇo:/ — has the same vowel sound /o:/.Answer:D. jaw