Which is a personal risk factor for wanting to join a gang? receiving poor grades in school
having a family member in a gang
hearing others discuss being in a gang
feeling isolated from the popular in-crowd

Answer in 2009 barack obama signed into law the family smoking prevention and tobacco control act, the new law (h.r.   1256) represents the most sweeping action taken to date to reduce what remains the leading preventable cause of death in the united states;

Ibelieve the answer is microorganisms within the body develop mutations, so d.hope i you out : )