Answer:
How often? 2 times a day or minimum 1 times. How hard? depends on age.If the person is below 30, he/she can have a hard workout. How long? 1 or 2 hours per exercise is enough and ideal for everyone.
<h2>Please mark me as brainliest and as helpful!!!</h2>
Explanation:
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>
The answer is C) Because nothing in this world is limited, especially not your nowledge base.
It would be A It does not state how much weight needs to be lost
You should not puncture a blister unless it is large, painful, or likely to be further irritated.
