Answer:
The research strategy being used is: correlational.
Step-by-step explanation:
A correalational reaserch strategy is used when wanting to analyze the relationship beteen two variables, to see how each one influence one another.
In this case Brittney is analyzing the relationship between caloric intake and emotional arousal. Using this type of strategy she can answer: how strong this variables influence one anonther, if they go in a positive correlation (they change in the same direction), if they have a negative correlation (they change in different directions), and also if the influence is linear o not.