Answer:
A.
Step-by-step explanation:
btw this is a biology question, but the reason it's A because think of external+ outside. all the other multiple choices are internal. Such as when you're hungry that's inside of your body same as being thirsty
Answer: a rabbit runs away from a fox that is chasing it
Step-by-step explanation: External stimuli is a reaction. So the rabbit running away from the fox would be a reaction
