Question

Eighteen-month old quentin's large vocabulary appears to be due to his ability to recall and repeat any word that he just heard. This indicates that quentin has an excellent ____ memory.

Answer 1

I believe the answer is: Phonological memory

Phonological memory in our mind help us process both spoken and written language at the same time. The memory help us increase our awareness by helping retrieving the words that we somehow ever heard in the past. Damages in phonological memory tend to become a hindrance for language acquisition/learning.