When she studies for her humanities tests, kelly always goes to the classroom where the humanities class is held. by studying in the same setting where she'll take the test, kelly is trying to use to her advantage?

I believe the answer is:  the context effect

 the context effect refers to how environmental factors could influence the perception of a certain individuals toward a stimulus.
Studies showed that our body tend to perform in a higher efficiency if we operates in the environment that we're familiar with, which make kelly much more likely to study better in the same room setting.