3. Why are coral reefs described as "underwater cities"? A. Because they are made of hard structures like buildings. B. Because they are home to a large population of organisms. C. Because they are in deep, dark parts of the ocean. D. Because they are a popular tourist destination. 4. What can be inferred about the relationship between coral polyp zooxanthellae? A. They are competitors for resources. B. They are predators and prey. C. They are mutually beneficial partners. D. They have no significant impact on each other.
Answer (1)
3. The correct answer is B. Because they are home to a large population of organisms.Coral reefs are called "underwater cities" since they provide shelter, food, and breeding grounds for many different marine species.4. The correct answer is C. They are mutually beneficial partners.Coral polyps give zooxanthellae a safe place to live, while zooxanthellae provide food (through photosynthesis) that helps corals survive.
