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Which best revises a sentence from the paragraph by adding an appropriate transition?

Similarly, forests are more than just a pretty addition to the landscape.

For example, forests help the environment by soaking up carbon dioxide, conserving soil, and preventing flooding.

However, forests help people by providing a place to live and by providing jobs.

To summarize, over 300 million people worldwide live in forests, and over 1.6 billion people depend on forests for their jobs.