Final answer:
Ellie decided to become an environmentalist instead of a detective due to her passion for the outdoors and the environment. She wanted to work towards preserving and protecting the environment.
Step-by-step explanation:
Ellie decided to become an environmentalist instead of a detective because of her passion for the outdoors and the environment. Her love for nature and concern for the well-being of the planet led her to choose a career focused on preserving and protecting the environment. As an environmentalist, she can work towards creating a positive impact on the environment and contribute to making the world a better place for future generations.