It wasn't like the kid didn't understand what death was.
When he was a little bit younger, he had a small kitten. His brother had found the kitten near the jungle and brought it home. The little kid liked the kitten a lot. He spent his days playing with the kitten until one day when it was cold outside, he came home but the kitten didn't. No matter what he did, his mother didn't allow him to go out and search for his friend. The boy couldn't sleep that night, worried about his kitten.
The little boy found the kitten the next morning. It was lying in their back garden, unmoving, its body cold and stiff. He hugged the kitten and took him home, placed it near the fire, and warmed it, but his friend didn't open its eyes.
That day, his mother explained to him that the life of the kitten has come to an end, that it'd never wake up again and its body will never move.
