Answer:
mnemonics
Step-by-step explanation:
Mnemonics are a strategic tool or technique to remember certain things for a longer period of time. It helps students to remember important information using this technique by developing certain helping aids or tools.
It makes use of certain encoding and imagery, retrieval cues that helps individuals for efficient retrieval and storage of any information.
The mnemonics takes the help of certain key words or acronyms or rhyming words, etc.
In the given context, Dominique makes use of certain key words and acronyms to remember certain important information like the color of the rainbow or the mathematical operations by the help of mnemonics.
Thus Dominique’s memory success is because of the use of mnemonics.
Therefore the answer is ---
Mnemonics