Q: What is the term for something in the environment that causes a reaction in an organism?


Read this paragraph and choose the correct option from the provided answers:

When a living thing responds to its environment, it is responding to a stimulus. A stimulus ( stimuli, plural ) is something in the environment that causes a reaction in an organism. The reaction a stimulus produces is called a response .

 Choices:

- pollution

- crisis

- climate

- stimulus


A:
stimulus