why is it called riverdance?

as asked by one of my faithful loyal readers

Answer 1)
Because it is based on the life of a river. It begins quietly, with the Cloudsong sung by the choir, then flows as a stream, represented by the soft shoe Dance of the Riverwoman, meeting and awakening the land, represented by the hard shoe solo of Earthrise, before growing and
growing until it throws itself into the sea (Riverdance).

Answer 2)
The reason it's called "riverdance" is because when the dancers reach their top speed, they tend to "sweat rivers".

Answer 3)
Because, back in the potato famine, the Irish people would go down to the river and stomp their feet to get the potato's to rise to the surface from the bottom of the river.

Okay, I made one of those up.