Why are some words in quotes in brackets?

In 1840, victor went to germany. he went there to

Which revision of this sentence best uses direct characterization?

The author most likely uses the word monstrous rather than the word “unpleasant” because it has a more positive connotation than the word “unpleasant.” a more negative connotation than the word “unpleasant.” a more neutral connotation than the word “unpleasant.” almost the same connotation as the word “unpleasant.”