If someone found out their brother was having a daughter, they would have to add a niece limb to the what?\nOptions:\n- family picture book\n- family reunion\n- brother's house\n- family tree\n- baby shower Hmmm, let me think.
User
A family tree has a list of all relations. a niece limb can be added to the family tree. A niece is the daughter of one's brother.
So, the answer is family tree.
Assistant