B. The air you breathe.
Because the rest of the choices are not environmental factors. Gang activity, and access to jobs and education are not environmental because environment are things about the world.
Eat and eat often. While everyone should abide by this rule, it is especially true for those who are trying to gain weight. Eating often means eating five to six small meals a day and packing in those nutrients.
This doesn't mean eating junk food and sugars, it means lots of protein and carbs.
No just be careful because somethings might not be the best
The correct answer is:
C. Staying connect to friends.