I think that the bright light would be the "stimulus" and the pupil constricting would be the "response".
Answer:
The answer is letter C
Explanation:
The evolutionary mechanism most likely responsible for the difference between the two populations is natural selection.
The answer is C. My explanation is that in the sentence, it has the words “will probably,” next to each other, so that means it is not a fact and it is not a 100% for certain that it will/had happen(ed). People may have different feelings/views about it. Also, all of the other sentences are more direct and do not have those words, and they sounds confident. Hope this helps!
Answer:
You have the exact same types of chemicals in your body as when you were younger.
Explanation: