Karyn is a zookeeper who takes care of baboons. Each day, Karyn writes down how the baboons eat, play, sleep, and wash. She reviews her notes every week to see if the animals are healthy and content. Which statement explains why Karyn's approach is an investigation instead of an experiment?


She is measuring variables.


She is testing a specific hypothesis.


She is not following the scientific method.


She is not attempting to change outcomes.