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If the mother is Drinking, Smoking, and doing drugs while she's pregnant those are all unhealthy and can cause the baby to have health problems.
The study of a living being is called biology. There are different types of living species are there and these are plants and animals.
The correct answer is mentioned below.
What is a fetus?
- A fetus or fetus is the unborn offspring that develops from an animal embryo. Following embryonic development the fetal stage of development takes place.
- In human prenatal development, fetal development begins from the ninth week after fertilization and continues until birth.
According to the question, the expectant behavior is as follows:- Drinking
- Smoking
- Drugs
Those are all unhealthy and can cause the baby to have health problems.
For more information about the fetus, refer to the link:-
https://brainly.com/question/787658