Question

A group of researchers are monitoring the health of a salt marsh. They
measure high levels of nitrates and phosphates in the sediment of the marsh
but not in the water samples. In this instance, which ecological service is the
marsh providing?

A. coastal land
B. Aquatic habitat
C.Flood protection
D. Water purification

Answer 1

I’m guessing B because it’s talking about salt water marshes and salt water fish need salt water they could be measuring how Much salt is left for the fish

Answer 2

Answer:

It is D

Explanation:

Trust me I've taken it already, and plus it talks about it not being in the water.