Which sound is an example of a velar consonant?

A velar consonant is produced with the back part of the tongue against the soft palate, also known as the velum. The sound represented by 'K' is indeed a velar consonant because it is articulated by raising the back of the tongue to the soft palate, allowing it to create the characteristic sound.

In contrast, the sounds associated with the other letters involve different articulatory placements: 'D' and 'T' are alveolar consonants, produced with the tongue against the alveolar ridge (the bony ridge just behind the upper front teeth), while 'N' is a nasal consonant that is also produced at the alveolar ridge, specifically by lowering the tongue and allowing air to pass through the nasal cavity. Thus, 'K' distinctly fits the definition of a velar consonant.