Smoking or drug addiction for an expecting mother is more dangerous because not only are the chemicals affecting her but they are affecting her baby as well if addiction continues through to the birth of the child the baby can experience withdrawal symptoms and can be underdeveloped
Positive family ties would lead to a greater sense of responsibility for one's self and one's family, so people with positive family ties are more motivated to engage in behaviors that lead to better health.
Neurotoxins are nerves that are destructive to the nerve system. It can affect function and development of the nervous system
