Concept:The word
ploy has the vowel sound /ɔɪ/.
We must choose the option that has the same vowel sound.
Explanation:The underlined letters in
ploy produce the diphthong /ɔɪ/.
Now examine the vowel sound in each option.
A.
plough is pronounced /plaʊ/ — its vowel sound is /aʊ/, which is different.
B.
law is pronounced /lɔː/ — its vowel sound is /ɔː/, which is different.
C.
noise is pronounced /nɔɪz/ — its vowel sound is /ɔɪ/, which is the same.
D.
sort is pronounced /sɔːt/ — its vowel sound is /ɔː/, which is different.
Therefore,
noise shares the same vowel sound /ɔɪ/ as
ploy.
Answer:C. noise