Frodo is characterized in the passage from "The Lord of the Rings" as being reserved and thoughtful, which is further explained below. (second option)
What is characterization?
We can define characterization in literature as the manner in which an author describes a character. In other words, the author lets us know the personality as well as appearance of a character through characterization.
In the passage, the author uses words such as "silent", "ignored", keeping for laughter" and "troubled" to show that Frodo is quite a reserved and thoughtful character. He does not say much, but he feels deeply.
With the information above in mind, we can select the second option as the correct answer.
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