The contains the placenta, uterine lining, and the amnion.

a. afterbirth

b. chorion

c. yolk sac

d. fetus

The fetus contains the placenta, uterine lining, and the amnion.  :)

D (fetus)

Explanation:

The uterus is an organ of the female reproductive system. It's shaped like an upside-down pear and has thick walls. The uterus houses and nourish a fetus until it's ready for birth.

The inner layer of the uterus (womb) or the cells that line the womb is called uterine lining or anatomically termed the endometrium. It functions to prevent adhesions between the opposed walls of the myometrium, thereby maintaining the patency of the uterine cavity.

The fetus is an unborn offspring, from the embryo stage (8 weeks after conception when major structures have formed) until birth. The fetal period is more about growth and development. The fetus contains vital parts necessary for its survival. They include placenta, amnion and uterine lining.

The placenta is a composition structure of embryonic and maternal tissue that supplies nutrients to the developing embryo. It serves as an interface between the mother and the developing fetus. It attaches the fetus to the uterine wall, provide nutrients to the fetus and allows the fetus to transfer waste products to the mother's blood.

The amnion is found in the innermost part of the placenta. It is a thin but tough sac of membrane that covers an embryo. Its main purpose is to protect the embryo during the months of pregnancy by reducing the risk of injuries to the unborn embryo and its development in the womb. It is one of the defenses against any potential fetal damage during the developmental stages.