Answer:
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.