Daedalus is responsible for his son's death because he created the wings that caused his son, Icarus, to fall into the sea.
In Greek mythology, Daedalus is indeed associated with the death of his son, Icarus. The story is most famously recounted in Ovid's "Metamorphoses." Daedalus was a skilled craftsman and inventor who designed the Labyrinth for King Minos of Crete. However, when Daedalus and his son Icarus were imprisoned in the Labyrinth, Daedalus fashioned wings for both of them using feathers and wax. Before they took flight, Daedalus warned Icarus not to fly too close to the sun, as the wax on the wings would melt. Despite the warning, Icarus became overconfident and flew too high, causing the wax to melt. As a result, Icarus fell into the sea and drowned. The evidence that Daedalus is responsible for his son's death lies in the fact that he was the one who created the wings and issued the warning. The tragedy occurred due to Icarus's disobedience and disregard for his father's advice, but the direct cause of Icarus's death can be attributed to the design of the wings by Daedalus, which proved to be flawed in the face of Icarus's imprudent actions.