I am sure these answers are correct cause I've checked all of them. Here they are :
1) The thing which might happen to the rest of the water is that 61% of that water leaves the ground through evapotranspiration and 38% will flow into the Atlantic Ocean.
2) The four states which receive drinking water from Florida are : South Carolina, Georgia, Alabama, Mississippi
3) The reason why people in Florida wanted to get rid of the water in certain areas is abundance of wetlands. I think there is one more, if it is acceptable I suggest you using this - frequent flooding.
4) The negative result of the changes which people made to get rid of the water is the first sign of drought.
5) The thing that has been done to try and improve those mistakes was creating a tool which looked like a dam to prevent dfficulties with navigating the state.
Hope that helps.