Velar fronting is best described as

• A. Velars are replaced with alveolars
• B. Back consonants replaced with more anteriorly produced consonants
• C. Vowels are fronted
• D. The last consonant is deleted

Answer: (A)

Velar fronting is when sounds made with the back of the mouth (velars like k and g) are replaced by sounds made further forward in the mouth (alveolars like t and d). In young speech you might hear cat come out as tat or dog as dod, showing the place of articulation moving forward. This is a forward-shift substitution of the velar place of articulation.

Other ideas described here would involve entirely different patterns: changing back consonants would mean fronting those back sounds, not just the velars; changing vowels would be a vowel fronting process; deleting the last consonant would be a different kind of simplification altogether.