I believe the correct answer is: He flies too close to the sun, and he falls when the sun melts the wax holding his wings together.
In the Ovid’s brief story about Icarus and Daedalus narrated in the “Metamorphoses”, Icarus is the son of the master craftsman Daedalus, who is hired to build a labyrinth for king Minos to imprison Minotaur on Create. But seeing that king Minos won’t let them leave the island, Daedalus decides to build the wings for them from the feathers and wax. They succeed in leaving the island, but Icarus becomes overcome vanity tries to reach the sun and falls for the heat of the sun melts the wax holding his wings together.