The answer is force because Force is needed to change the direction of a moving mass.
Myocardial infarction, the medical term for heart attack, literally means "heart tissue damage or death.". Heart attacks most commonly occur when one or more of the coronary arteries — a network of blood vessels that supply blood to the heart — become blocked. Heart muscle becomes starved for oxygen and nutrients.
Answer:
D, an increase in muscle tissue
Explanation:
Strength training builds muscle.
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Likely the chronological age, mainly because it would explain the differences in puberty stages between the two boys, which is an example of physical maturation.
