Niagara river.
It canects to the Hudson river
the mouth of the Niagara falls means the begging of the river or in this case the fall.
The Niagara River
The Niagara River is in North America
Niagara falls is along the Niagara RiverNiagara Falls is on the Niagara River.
Falling into the water
It's called the Niagara River.
No, Lake Erie is the source of the Niagara River. Lake Ontario is the mouth of the Niagara River (meaning, the river flows into Lake Ontario).
Niagara Falls.
No, the compound noun 'Niagara falls' is a proper noun, the name of a specific place.
The Niagara River flows out of Lake Erie and to Lake Ontario.