In Judith Ortiz Cofer's "Gravity" the conflict between her mother and father is A. the mother wants to return to Puerto Rico, but the father is committed to staying in the United States. Elenita's mother is always talking about the family on the Island and longing to see them again. On the contrary, her father is constantly speaking about the restaurant owned by Reyes. He is constantly offering excuses for not going to Puerto Rico. After some years Elenita learns that her father was ashamed of not being able to provide them with the middle-class life her mother was used to in Puerto Rico, so he doesn't want to face her mother's family
So, a possessive noun is usually used to indicate who or what has something, like "The Dogs' ball."
To change this form of children,plural, to a possessive noun, you will want to add an apostrophe, and then an s. It changes to this:
Children's