In "The Cay," what is a hard substance made up of tiny sea animals skeletons?It is answered near the part wear Phillip went into the hole.

Expert Answers
gbeatty eNotes educator| Certified Educator

That's coral. For more on how coral is formed, you might visit the website indicated below:

 

http://library.thinkquest.org/25713/reefs_made.html

 

hunterbug | Student

i don't know the answer