External stimulus. The rain is something out of your control while you're waiting. Rain is not something you are doing nor is it a response to you waiting for the bus.
Answer:
the first one i think is d
Answer:
Explanation:The scientific method is a process used by scientists to study the world around them. ... You can use the scientific method to study a leaf, a dog, an ocean, or the entire Universe. We all have questions about the world. The scientific method is there to test if your answer was correct.
