Answer:
Using a mnemonic device is the best technique being utilized by Aria.
Step-by-step explanation:
A mnemonic device is a technique or strategy used to assist with learning and memory, such as a rhyme, acronym, or phrase, to help remember specific information. In this case, Aria is using a phrase ("PEST OF 6") as a way to help her remember the names of the cranial bones. This technique can be effective in helping her remember the information more easily and efficiently.