The statue of Liberty is made out of copper metal. When it was first constructed, the color of the copper metal was bright burnt orange. Over time, however, it slowly developed a green color as it was exposed to air. What happened to the statue of liberty?

When the Statue was unveiled in 1886, it was a shiny brown color, like a penny. By 1906, the color had changed to green. The reason the Statue of Liberty changed colors is that the outer surface is covered with hundreds of thin copper sheets. Copper reacts with the air to form a patina or verdigris.

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Ithink it’s 3 as the answer.