Answer and show work ,optional

the answer is A

hope it helps also its logical because it explains it in a scientific proof while others dont.If you want me to show work there is a website where it explains: https://onlinelibrary.wiley.com/doi/full/10.1111/dgd.12592

A

Explanation: I hope it helps! :)

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."