Concept:The underlined letter in "tax" represents the consonant cluster
/ks/.
We need the option that contains this same final sound sequence.
Explanation:The word "tax" is pronounced as
/ tæks /.
The letter "x" produces two sounds:
/k/ followed by
/s/.
Now examine each option.
Option A, "ask", is
/a:sk/. It ends with the reversed cluster
/sk/, not
/ks/.
Option B, "ached", is
/eıkt/. It contains
/kt/, so it does not match.
Option C, "lacks", is
/læks/. Its ending
/ks/ exactly matches the sound in "tax".
Option D, "kiss", is
/kis/. It has a
/k/ at the beginning and a separate
/s/ at the end, not the cluster
/ks/.
Thus the word that shares the same consonant sound is "lacks".
Answer:C. lacks