I believe the answer is (a) variability
Choanal atresia<span> is a congenital disorder where the back of the nasal passage </span><span> is blocked, usually by abnormal bony or soft tissue (membranous) due to failed recanalization of the nasal fossae during fetal development.</span>
A state of happiness and satisfaction
Basically the main function of both of these has to do with blood. Arteries are important because they move blood away from the heart. Veins do the opposite of arteries and actually return blood back to the heart! They are both very important for the body.
Answer:
Water
Explanation:
Because if drink a sports drink it has a lot of sugar and you might get the calories back. But if you drink water it wont do you any harm because water doesn't have any sugar and you might loose a bit more weight.
Hope this helped!☺