The correct answer is D, Hope that helps! :)
This process plays a vital role in reproduction.
It specifies what exactly the variations are of whatever population is being examined.
Answer:smooth and involuntary
Explanation:the sphincter papillae are muscles responsible for narrowing the pupil, while the dilator papillae makes the pupil larger. Both of them are smooth types of muscles, that are controlled by nerves, sending signals from the brain about the light conditions.
