Concept:The vowel sound in "gorilla" is the unstressed /ə/ sound.Explanation:"Gorilla" is pronounced as /ɡəˈrɪlə/, which contains the /ə/ vowel sound."Colour" is pronounced as /ˈkʌlə/, and its final sound is also /ə/.The other options do not contain this same vowel sound.Hence, the word with the same vowel sound is "colour".Answer:B. colour