You can find your pulse in either wrist (I think) and on the side of your neck if you push a little.
Answer:
D) is the answer because it only allows particular molecules to get in and out
It's D. Stretching opens up arteries. This makes blood more able to get through and lowers blood pressure. Stretching makes your muscles ready for an exercise. Improved circulation is just like lowering blood pressure because it opens up arteries, veins, and capillaries. D is wrong because stretching doesn't make your heart stronger. I hope this helps! :)
They feel good about themselves and are satisfied with their abilities.
