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.
I think the answer is the moon in its orbit around the Earth
The answer is; Physical weathering by water would carve out the face of the cliff.
The bottom of the cliff would register the greatest weathering because of the force of the water hitting the rocks in the fall. As a cave is curved from the base of the cliff, the overhanging part of the cliff eventually collapses hence retracting the cliff a small distance upstream of the river. The diagram below demonstrates this;