Corals form large colonies in shallow tropical water, and coral is the calcite shell of the coral animal. Given these facts, animals with _ form large colonies in shallow tropical water among the following options:
- calcite shells
 - an organism's body
 - Absorb light
 - biological diversity
 - Leptospirosis
 - produce offspring
 - allow growth
 - to stay warm


 

 calcite shells        