Read the excerpt from "The Selfish Giant" by Oscar Wilde. One day the Giant came back. He had been to visit his friend the Cornish ogre, and had stayed with him for seven years. After the seven years were over he had said all that he had to say, for his conversation was limited, and he determined to return to his own castle. When he arrived he saw the children playing in the garden.

"What are you doing here?” he cried in a very gruff voice, and the children ran away.

"My own garden is my own garden,” said the Giant; "anyone can understand that, and I will allow nobody to play in it but myself.” So he built a high wall all round it, and put up a notice-board.

TRESPASSERS
WILL BE
PROSECUTED

In this excerpt, dialogue is used to

develop a conflict by revealing the children's actions.
move the story forward by introducing a new character.
make the story more dramatic by showing that the giant is surprised.
move the story forward by showing how the giant reacts to the children.