What is significant about Louisiana’s swamps and marshes? Check all that apply.

a - They make up the most fragile and valuable wetlands in the US.
b - They create a natural barrier around the city of New Orleans.
c - They cause a decrease in natural habitats for local wildlife.
d - They are a major cause of subsidence and lead to erosion.
e - They contribute more than $1 billion a year to the state’s seafood industry.