Answer:
Countable noun :
The things that we can count 1 by 1 .
Eg. Stone, pens etc
where as,
Concrete noun:
The noun that we can touch,see.
Eg. Dog, dust
Orpheus' music had the ability to charm all living things, including people and gods. It had a powerful effect on all people. When Orpheus traveled to the underworld to retrieve his wife, his music softened the hearts of Hades and Persephone. When Orpheus traveled with the Argonauts, he was able to save them from the Sirens by playing music that was louder and even more enchanting.
I believe your answer is Facts and evidence.