Question

Which accurately describes coral reefs? Select the three correct answers.
Responses

Coral reef ecosystems are among the most biodiverse on Earth.
Coral reef ecosystems are among the most biodiverse on Earth. - no response given

Coral reef ecosystems have low biodiversity.
Coral reef ecosystems have low biodiversity. - no response given

Coral reefs are delicate structures that usually exist for less than 10 years.
Coral reefs are delicate structures that usually exist for less than 10 years. - no response given

Coral reefs often are located in nutrient-rich waters.
Coral reefs often are located in nutrient-rich waters. - no response given

Coral reefs are sturdy structures that can exist for thousands of years.
Coral reefs are sturdy structures that can exist for thousands of years. - no response given

Coral reefs often are located in nutrient-poor waters.

Answer 1

Correct answers:
- Coral reef ecosystems are among the most biodiverse on Earth.
- Coral reefs are sturdy structures that can exist for thousands of years.
- Coral reefs often are located in nutrient-poor waters.