Final answer:
During fetal development, the organs of a fetus whale are held within the body. Organs develop in the first trimester, but many are not yet functioning. Exposure to toxins can be harmful to the fetus.
Step-by-step explanation:
During fetal development, the organs of a fetus whale are held within the body. The internal organs and body structures begin to develop during the first trimester of pregnancy. By eight weeks, the fetus is essentially formed, but many of the organs, such as the lungs and liver, are not yet functioning. It is important to note that exposure to toxins during this period can severely affect the survival of the fetus.