What preserved the art of Altamira until modern day?

Question

pick one
Responses

the Paleolithic inhabitants sealed off the cave once all the walls and ceilings had been painted
the Paleolithic inhabitants sealed off the cave once all the walls and ceilings had been painted
the Paleolithic inhabitants covered their artwork with a layer of animal fat to protect the paintings
the Paleolithic inhabitants covered their artwork with a layer of animal fat to protect the paintings
a natural collapse at the end of the Upper Paleolithic period
a natural collapse at the end of the Upper Paleolithic period
an intentional collapse by the people of the Upper Paleolithic period

Answer 1

The correct response is:

the Paleolithic inhabitants sealed off the cave once all the walls and ceilings had been painted.