Read the sentence below. Then, answer the question that follows.
Coral reefs and ocean plants live cooperatively—the coral organisms get their oxygen from the plants, which grow on the reef structures. This is why reefs usually grow in sunny areas near the surface.
Which choice below best paraphrases the passage?
Coral reefs and ocean plants live cooperatively, so reefs grow in sunny areas close to the ocean’s surface.
Coral reefs and ocean plants live cooperatively, which is why reefs grow in sunny areas near the surface.
Coral reefs are found close to the sunny ocean surface because the plants they rely on need sunlight to grow.
Coral reefs don’t need sunlight. They do, however, need oxygen, which they get from the ocean plants.