They are often targets because they don't fight back, they often provoke their aggressor.
The answer is A. A medical journal is definitely a reliable source and the other choices are not. :)
Answer: False
Explanation:
Physical activity involves the movement of the body. Physical activity is important as it helps in the improvement of ones brain and also provides strength to the bones.
It should be noted that physical activity must not be strenuous to be effective. For example, one can take a walk or rather than using an elevator, one can take a stair. This is a physical activity and it's not stressful.