Shamona, a pregnant mother in flint, michigan, is concerned about the drinking water, which shows high levels of lead. shamona should know that high levels of prenatal lead exposure are related to " facial abnormalities and heart defects defects of the genitals and urinary tract low birth weight and brain damage a variety of childhood cancers

Option (3).

Explanation:

Teratogens may be defined as the chemicals that can cause birth defects in the fetus. Substances like alcohol, lead and nicotine acts as the main agents of tertaogens.

Shamona is drinking water that contains high level of lead. The element lead is harmful for the fetus. Even the small concentration of lead is enough to cause birth defects. The lead exposure can cause the abnormal development of brain and damages the brain of fetus. The fetus has low birth weight also.

Thus, the correct answer is option (3).