I don't see a word in bold type.
He probably uses a metaphor because a simile uses the words like and as and a metaphor does not use the words like and as. Hope this helps!
Answer:
Question 1: The boy's journey begins because he loves the merchant's daughter and he wants to impress her.
Question 2: "When a person really desires something, all the universe conspires to help that person to realize his dream."
Question 3:
"'That's the way it always is,' said the old man. 'It's called the principle of favorability. When you play cards the first time, you are almost sure to win.'"
Explanation:
Answer: the fact of to things being seen or placed close together with contrasting effect.
Explanation: I guess a juxtaposition is used for contrast to make a certain point or meaning come to focus in a certain story. Hope it helped