Respuesta :
Answer:
d. fetus
Explanation:
According to my research on studies conducted by various medical professionals, I can say that based on the information provided within the question you know that the period of the fetus has begun. The fetal period is the third stage in prenatal development that takes place between week nine and birth. This is the stage in which many of the body systems will begin to mature.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
