Answer:
Teratogen
Explanation:
Teratogen -
It is the cause of danger to the life of he fetus , and can even damage the body of the women and the embryo , is referred to as the Teratogen .
Hence , from the question ,
Smoking even during the stage of pregnancy , can cause harm to the unborn life , as the mother smokes very heavily .
Hence , from the given scenario of the question ,
The correct answer is Teratogen .
