Yes. The passage contains a homophone error. In the sentence, "their" should be replaced with "there". To determine if a passage contains a homophone error, you need to carefully read the passage and identify any words that sound the same but have different meanings and spellings. In this case, "their" and "there" are homophones. "Their" is a possessive pronoun indicating ownership, while "there" is an adverb indicating a location or a point in a sentence.