Answer: The correct answer is -
uterus.
Step-by-step explanation:
The development of embryo ( that is stage from second to eighth week after fertilization) takes place in the womb of mother, which is referred as Uterus.
After fertilization of egg, the zygote (fertilized egg) undergo divisions and forms a ball of cells called blastocyst, which eventually implants in the uterine wall (approximately one week after fertilization) and remains there for complete development till birth.
Thus, uterus is the right answer.