Final answer:
An auditory learner will best retain information through verbal explanations as they have a preference for acoustic processing which aids in memory retention.
Step-by-step explanation:
An auditory learner will retain information best if instructions are verbally explained. This caters directly to their learning style preference, which is to hear and process information through listening. Psychologists Craik and Tulving's studies suggest that acoustic processing, which involves focusing on the sound or rhyming of words, can enhance memory retention. Therefore, auditory learners benefit most when new concepts or instructions are spoken rather than written. This auditory method allows these learners to use their strength in acoustic processing to remember and recall information more effectively.