Concept:The underlined letters "ch" in the given word produce the consonant sound /tʃ/.
Explanation:The word "cheek" is pronounced /tʃiːk/, starting with the sound /tʃ/.
Now check each option for the same initial consonant sound:
A. "chemist" starts with /k/ as /ˈkemɪst/.
B. "campaign" starts with /k/ as /kæmˈpeɪn/.
C. "sharp" starts with /ʃ/ as /ʃɑːp/.
D. "cheque" is pronounced /tʃek/ and begins with /tʃ/.
Therefore, only option D shares the consonant sound /tʃ/.
Answer:D. cheque