Question

the drinking of alcoholic beverages by a pregnant woman is harmful to the development of her fetus. this is most damaging early in a pregnancy because during this time
many of the essential organs of the fetus are forming.
the lungs of the fetus become functional.
alcohol can easily enter the mouth of the fetus.
the fetus cannot excrete wastes.

Explanation:

In early pregnancy, the fetus is in the organogenesis stage where major organs are developing. Alcohol exposure during this critical period can disrupt normal organ formation, leading to birth defects. The other options are incorrect: fetal lungs aren't functional early on, alcohol enters via the placenta (not fetus's mouth), and waste excretion isn't the main reason for early - stage alcohol - related harm.

Answer:

A. many of the essential organs of the fetus are forming.