When the chick is old enough, King Penguins put it in one of the crèches, returning every several days with food. Both parents will leave at the same time. All the chicks in the rookery will stay together until their parents return. When the parents come home they recognize each other by the sound of their voices.
It is almost no adoption cases among King Penguins. If both adult penguins die or fail to find their chick it will starve and die since chicks are still too young to swim for their own food.
This picture was taken at Saint Andrew's Bay, on shoreline of South Georgia - beautiful and rugged island lying 1600 km north of the Antarctic in the South Atlantic Ocean.