Answer:
Chunking
Step-by-step explanation:
Chunking is a process by which random information is organized in groups which is easier to remember rather than remembering the information as is. The chunks are the groups of information that makes sense to us hence it is easier to remember.
Here, the ten letters themselves do not carry any logic behind them. So, Debbie reorganized them into the words BARNS and YARDS. The chunks are words which are related to one another. Hence, this makes it easier for Debbie to remember the letters.