Sabemos que la historia es un porque tiene elementos de fantasía como el minotauro y dioses.

The right answer that fills the blank is:

- Sabemos que la historia es un mito porque tiene elementos de fantasía como el minotauro y dioses.

Explanation:

Myths are methods of oral tradition in which we try to explain different phenomena that in each of the civilizations have not been explained by science (for example, in Greek mythology the god Helios was used and his golden carriage as a explanation of the movement of the sun throughout the day), also usually include fantastic creatures that regularly refer to hybrids of known animals (such as the minotaur, bull and human hybrid or the pegasus, horse and bird hybrid).