Because in its own way they both share a story either through the art or the music. Art shows the story while in music you listen to the story!
I'm pretty sure it was the other way around.
Answer:
I believe it shows both higher level thinking as well as a form of art. The Blombos caves shows ancient artifacts showing interlectual structure of improvement by adapting the form of art. The caves preserved the art showing that they have learned how to create triangular art by carving the stone(similar to the woodcut technique) which would be widdled with a sharp object such as a knife, bones, or a sharp stone. As for the artifacts, the cave walls were painted(proof of art) showing ancient animals and how they hunted by creating weapons(also artifacts). So as you might see, the Blombos caves show artifacts of a higher thinking as well as a form of art.
Explanation:
You might want to rephrase it slightly so that you dont get a 0 on it