What is an example of consonant harmony?

Consonant harmony refers to a phonological process where one consonant in a word adopts features (such as voicing, place, or manner of articulation) from another consonant within that same word. This phenomenon often occurs in language development in children or in specific dialects and reflects an aspiration for phonetic ease or simplification in speech.

In contrast, the other options do not represent consonant harmony. Having syllables that start with different consonants does not indicate any overlapping features or harmony between those sounds. A vowel sound substituting for a consonant sound pertains to different types of phonological processes and does not involve consonant features influencing one another. Lastly, changing a consonant sound to a vowel sound is a phonological alteration that does not describe consonants harmonizing with each other.

Thus, the correct answer clearly captures the essence of consonant harmony as it involves the interaction of consonants within a word.