Lesson 14-Expository Forms

Read the passage and then choose the best answer.

Why Do Leaves Change Color?

Where Leaf Colors Come From

If you live in a place where the leaves change color in the autumn, you probably notice that only some trees become colorful. The trees that change color have special types of leaves that contain the building blocks for two colors. The first color is green, the color of the leaves during spring and summer. The second color can be red, orange, yellow, or brown, which are the colors that are visible in autumn. Both colors are inside each leaf all year long, but in spring and summer the green color forms the top layer.

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