电子课本网 第130页

第130页

信息发布者:
a good idea to encourage more people to help
to
largest
to live
Providing
the
happening
more
Luckily
importance
activities
In warm ocean waters all over the world.
Food, jobs and a special place to visit.
Tiny animals called coral polyps.
Yes. We can stop people throwing rubbish into the sea to protect coral reefs.