I think the anwser is a because a blood clot in the brain can cause a stroke because your blood staying around in one place can cause you to have a stroke.
Answer:
i think Marco should replace ''ever again'' with ''very often''
Explanation:
''potato chips'' wouldn't really change the sentence, ''this week'' would only lower a few calories but he want to <u>improve</u> his body, and never eating junk food again is probably impossible so the only option left is: ''very often''
The second statement best explains the type of blood vessel and the function of these vessels' valves - <span>These are veins, which prevent the backflow of blood because the walls have little muscle to pump blood back to the heart.
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Veins are large blood vessels which carry blood back to the heart. <span>Veins have a system of valves to prevent back-flow.</span>
One exercise that should be included is stretching before and after
I believe the answer is vegetables
