Answer:
Maintenance rehearsal
Explanation:
Maintenance rehearsal is a process related to short term memory that consists on verbalizing or thinking repeatedly about a piece of information. This way, the short term memory can hold the information for a little longer when we do this.
In this example, Adela mentally repeated the number while searching the shelves for the correct oil filter for her car. Adella was thinking repeatedly about this specific piece of information so she wouldn't forget it.
Thus, this is an example of using Maintenance rehearsal to keep the information in her short-term memory.