Select the correct text in the passage.

Read the excerpt from “You are Old, Father William,” by Lewis Carroll. Identify the pair of lines that expresses a humorous tone.

"You are old, Father William," the young man said,
"And your hair has become very white;
And yet you incessantly stand on your head—
Do you think, at your age, it is right?"

"In my youth," Father William replied to his son,
"I feared it might injure the brain;
But, now that I'm perfectly sure I have none,
Why I do it again and again."

PLEASE HELP!?

I believe the pair of lines that expresses a humorous tone is:

But, now that I'm perfectly sure I have none,

Why I do it again and again."

Explanation:

The pair of lines above is dictating the humorous tone of the poem. A father, someone who is obviously older than the son, and who should be expected to be wiser, claims to have no brain. Of course, not having a brain is impossible. He might mean that he has lost his mind, which might very well explain why now, being an old man, he chooses to stand on his head. That was something he should have done when he was younger, stronger, and less wise. It seems that this father is doing things backwards. His body is growing older, but his mind is growing younger.

a conclusion based on evidence is an example of a. inference