How do estuaries compare in terms of production compared to other areas?

There is no productivity in an estuary.
Estuaries are the most productive of all marine ecosystems.
Estuaries are productive, but far less than other marine ecosystems.
Estuaries are the least productive of all marine ecosystems

Question

How do estuaries compare in terms of production compared to other areas?

 There is no productivity in an estuary. 
 Estuaries are the most productive of all marine ecosystems. 
 Estuaries are productive, but far less than other marine ecosystems. 
 Estuaries are the least productive of all marine ecosystems

anonymous · Answer

Estuaries are the most productive of all marine ecosystems.

anonymous · Answer

thanks aha i think i only have one more question so =)

anonymous · Answer

lol your welcome