While researching a topic, a student has taken the following notes:
<ul> <li>Coral reefs cover less than 1% of the ocean floor.</li> <li>They support roughly 25% of all marine species.</li> <li>Mangrove forests grow along about 0.1% of the world's coastlines.</li> <li>They support nurseries for about 10% of commercial fish species.</li> <li>Both ecosystems are highly threatened by human activity.</li> </ul> The student wants to contrast the proportional biodiversity supported by the two ecosystems relative to their footprints. Which choice most effectively uses relevant information from the notes to accomplish this goal?Which choice most effectively makes the student's point?
- A
Both coral reefs and mangroves are threatened by human activity.
- B
Mangroves support nursery habitat for 10% of commercial fish.
- C
Coral reefs support 25% of marine species.
- Dcheck_circle
Coral reefs cover less than 1% of the ocean floor while supporting 25% of marine species; mangroves cover 0.1% of coastlines while serving as nurseries for 10% of commercial fish.
Explanation
The goal is contrasting proportional support. Choice B juxtaposes both ratios. A is similarity, C and D address only one ecosystem.