Answer:
due to the rate of blood circulation
B
Explanation
Sodium Fluoride
Answer:
A. Robin A will have an easier time finding a mate.
Explanation:
He will have an easier time since he have more songs, which the females find attractive.
I think the answer is D. A good indicator is the resting heart rate. Exercise strengthen your heart and it makes it more efficient. The resting heart rate shows of the heart is pumping blood normally each time it contracts. Having a normal resting heart rate would mean a healthy heart.