Why does water make Percy stronger and heals him?

In Rick Riordan's "Percy Jackson" series, water is a source of immense power for Percy because he is a demigod, the son of Poseidon, the Greek god of the sea. Exposure to water enhances his abilities, restoring his strength and healing his wounds, as it connects him to his divine heritage. This connection allows him to tap into the elemental power of the ocean, making him stronger in combat and more resilient in difficult situations.