Answer:
A. uterus
Step-by-step explanation:
There are a few stages of embryo development:
1. Fertilization: this is where the female gamete (egg) meets with the male gamete (sperm) and they form a zygote
2. Blastocyst development: this is where the zygote divides into a ball of cells that eventually becomes the embryo inside a structure called the blastocyst; the blastocyst then travels up to the uterus.
3. Embryo development: this is where the embryo truly starts to develop in the uterus, growing the crucial body parts