Concealed is when you hide something and revealed is when you reveal or show something
I think it might be illnesses or bacteria. that would be my guess.
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.
The term is sperm for the male reproductive cellar