Concept:A rhyme occurs when two words have the same vowel sound and the same final consonant sound.
Explanation:The given word "tax" is pronounced /tæks/.
Option C, "lacks", has the same final sounds: /læks/.
The shared ending /æks/ makes them rhyme perfectly.
Option A, "ask", has a different vowel sound and reversing consonant order, so it does not rhyme.
Option B, "box", uses a different vowel, /ɒks/, so it does not rhyme.
Option D, "back", misses the final /s/ sound, so it does not rhyme.
Therefore, the only word with the matching rhyme pattern is "lacks".
Answer:C. Lacks.