Simplify the following text for a Grade 11 native English-speaking person.
Original: Much of Florida consists of karst limestone veined with water-filled caves and sinkholes , which provide homes to many species of aquatic life , some unique to particular Florida locations .
Simplified: Much of Florida is made of karst limestone with water-filled caves and sinkholes , which provide homes to many species of aquatic life , some of which only live in Florida .