4.18Aiii- Coral Reefs Revising

Rafael needs to add a sentence that clearly states the central idea of his paper. Which of the following should Rafael add before sentence 1 to accomplish this goal?

• Coral reef communities are dying.

• An ecosystem is a partnership between living things and their environment.

• The coral becomes too weak and helpless against disease.

• Reefs feed and shelter all sea life.

What is the BEST way to revise sentence 6?

(6) Some of these fish eat seaweed or other plant life near the coral.

• Some of these fish eat seaweed, and other plant life near the coral.

• Some of these fish eat seaweed that other plant life near the coral.

• Some of these fish eat seaweed, or other plant life near the coral.

• The sentence does not need to be revised.

Which sentence should Rafael add to the end of his paper to bring it to a better close?

• Predators find their prey and hunt in the ocean.

• These corals were strong enough to absorb the shocks of earthquakes and bounce back.

• Coral looks like rocks, but is made up of tiny animals.

• These relationships between plant life, fish, and the coral are all signs of a healthy ecosystem.