Elise wants to get an apple off of a tree, but realizes that she can't because she only has a baseball bat with her, rather than a ladder or step stool. the fact that elise believes that the baseball bat can only be used to play baseball is an example of

functional fixedness              

Explanation:

Functional fixedness: The term is originated in Gestalt Psychology and refers to the cognitive bias that hinders a person's ability to think rationally for the use of an object apart from its traditional use. In other words, the incapability of a person to see an object fulfilling other function rather than the function it is intended for. It hampers or hinders an individual's problem-solving abilities.

Example: As given in the question, Elise is being functionally fixated because she couldn't think of using a baseball bat to get an apple off of a tree as she feels it can only be used to play baseball.

answer; i believe the correct answer is enlightenment;

you should try adrenaline. it kicks in in situations like this.