I'll give you a question, please answer with step-by-step reasoning process.
The olive branches are a symbol for peace, and the world map represents all the people and the countries of the world.\n\nAnswer this question: branches of which tree appear on the un flag?

olive
The important part for answering this question is: The olive branches are a symbol for peace, and the world map represents all the people and the countries of the world.

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Thus, the answer is olive