Final answer:
The subject of this question is Greek mythology, and the correct answer is Rhea, one of the Titans.
Step-by-step explanation:
The subject of this question is Greek mythology, which falls under the category of History. The question is asking about a particular Titan who is the daughter of Uranus and Gaea and the sister and wife of Cronus. This Titan is responsible for the way things flow in the kingdom of Cronus, and her name means 'that which flows'.
The correct answer to this question is Rhea. Rhea is one of the Titans in Greek mythology and is often associated with fertility and motherhood. She is the mother of several important gods and goddesses, including Zeus, Hades, and Poseidon. Rhea played a key role in overthrowing her husband Cronus and saving her children from being devoured by him.