Answer:
It gives the students nutrition and protein.
In a larger city you have the risk of being in danger more than in a small town because it more busy and has alot more going on which makes it harder to be physical active without getting hit by a car or someone walk or riding a bike.
A is the answer. This is because this was not covered by the Twin studies.
Good luck!
-RxL
Early Centuries. Aetius mentioned the use of surgery to treat goiter in the 6th century, believing that it was a hernia of the larynx.
