Marine fish gills have cells that have the ability to can remove salt by pumping it into the salt water.
This is active transport in real life.
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The answer should be letter B I'm sorry if not
A manifestation of local blood flow regulation.
Answer: Coastal estuary
Explanation:
Euryhaline animals are able to live in the wide range of salinity.These animals have the ability to live in the variety of water mostly fresh water.
The coastal estuary is one of the habitat of such animals. The green crab, molly fish are some example of the animals found in this environment.
Some of the euryhaline animals are also found in the salt and brackish water, fresh water, moderately haline et cetera.