This woman has a mature cystic teratoma, which in females is usually benign. This can be deduced from the presence of multiple mature tissues from all three germ layers that are not normally native to the ovary. Teratomas are derived from germ cells. (FA2020 p646)

Note to keep in mind: immature teratomas and other germ cell tumors are malignant in females, and in males even mature teratomas of the testes also may be malignant (all germ cell tumors in males are malignant)