Final Answe:
Millie who uses alcohol during pregnancy puts her child at the greatest risk of developing facial malformations.
Step-by-step explanation:
Alcohol consumption during pregnancy poses the highest risk of fetal alcohol spectrum disorders FASDs which may include facial malformations.
The developing fetus is particularly vulnerable to the teratogenic effects of alcohol during the first trimester when facial structures are forming.
Millies use of alcohol increases the likelihood of facial abnormalities in her child due to the direct impact of alcohol on embryonic development.
While nicotine and opiates can have adverse effects the association between alcohol use and facial malformations is more established and severe.
Exposure to alcohol during pregnancy is known to cause a range of developmental issues and understanding the risks associated with specific substances is crucial for maternal and fetal health.