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
Let’s work this out in a step by step way to be sure we have the right answer.
family tree
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.

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The answer is family tree