Concept:The /k/ sound is a voiceless velar stop.
It can be represented by different spellings such as c, k, ck, or x.
Explanation:Option A: "axe" is pronounced /æks/.
The letter "x" in "axe" produces the combined sounds /k/ + /s/, so /k/ is clearly heard.
Option B: "cease" is pronounced /siːs/.
Here, the letter "c" gives an /s/ sound, not a /k/ sound.
Option C: "knew" is pronounced /njuː/.
In this word, the initial "k" is silent.
Option D: "knob" is pronounced /nɒb/.
Again, the "k" is silent before the "n".
Hence, the only word that contains the /k/ sound is "axe".
Answer:A. axe