There are many Rivers called Avon. You need to be more specific.
Japan
The source of the Nile is Lake Victoria which inside Africa. It doesn't come from the Mediterranean Sea because if it did the salt water from the sea would've killed all the crops and plants. So as life surrounds the river and as the river empties into the Sea the Lake is the source.
A is an area of land where a river enters a lake of sea?
The mouth is where the river enters the sea.
Usually another river or the sea or a lake
Usually another river or the sea or a lake
The Jordan River flows into a lake called the Dead Sea.
The Niagara River connects Lake Erie and Lake Ontario.
Sort of, except the river doesn't go directly to the sea. St. Mary's River is the main outflow for Lake Superior, and carries the water into Lake Huron. Lake Huron's outflow is the St. Clair River, which flows into Lake St. Clair, which flows into the Detroit River, which flows into Lake Erie, which flows into the Niagara River, which flows into Lake Ontario, which flows into the St. Lawrence River, which leads to the sea (in the form of the Gulf of St. Lawrence, an estuary of the Atlantic Ocean).
A river is a body of water flowing to the sea or a lake.
At a lake. The end of a river is at the sea.
Generally another river or a lake or the sea etc.