D. Which of the following is NOT how redwoods help our planet?

The correct answer is **1) Redwoods are good for building houses.** **Explanation:** While redwoods might be used for building, the question asks about how they *help the planet*. Redwood forests help keep the air clean and are a good place for animals. Building houses, in contrast, involves cutting down trees which is less of a positive contribution to the planet's health. So, D = 1