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.
When new information or experiences cause you to modify your existing schemes.
This is true it's muscle tissue that are soft tissues that contains muscles that gives the ability to the muscles to contact.
Answer:
bone marrow transplant, blood transfusion, chemotherapy
Explanation:
its correct on edge
