What are the major characteristics of florida's three landform regions? worth 20 points me!

Some geographers divide Florida into three different landform regions: the Atlantic Coastal Plain, the East Gulf Coastal Plain, and the Florida Uplands. 
The Atlantic Coastal Plain runs along the eastern coast of Florida from Georgia to the southern tip. It is a low plain close to sea level. It is lined by sandy barrier islands. 
The East Gulf Coastal Plain has two parts.The northern part covers the Florida panhandle.The southern part runs along the coast from Tampa to the southern tip.This region includes barrier islands, rivers, and wetlands. 
The Florida Uplands is different from the other two regions. It is not a plain. It is a region of low hills in central and northern Florida. Most of it is less than 300 feet above sea level. It includes large forests and sinkhole lakes.These lakes are made when limestone beneath the ground has caved in and water has collected