Read this excerpt from Through the Looking-Glass. "What is it you want to buy?” the Sheep said at last, looking up for a moment from her knitting.

"I don't QUITE know yet,” Alice said, very gently. "I should like to look all round me first, if I might.”

"You may look in front of you, and on both sides, if you like,” said the Sheep: "but you can't look ALL round you—unless you've got eyes at the back of your head.”

But these, as it happened, Alice had NOT got: so she contented herself with turning round, looking at the shelves as she came to them.

How do the underlined words affect the tone of the passage?

They create a critical tone.
They create a neutral tone.
They create a relaxed tone.
They create an humorous tone.