Coral reefs provide food and shelter to many ocean organisms, and coral reefs are formed from coral skeletons. Given these facts, what provides food and shelter to many ocean organisms among the following options:
- It helps them survive
 - Something formed from skeleton
 - sedimentary rocks
 - important habitats
 - Something with a head, thorax, and abdomen
 - it protects them
 - gastropod shells
 - in their habitats


 

  Something formed from skeleton       