Final answer:
The sentence 'Logan plans to travel around Europe with his brother after he graduates' contains a vague pronoun reference; 'he' could refer to either Logan or his brother, leading to confusion.
Step-by-step explanation:
The text provided appears to have instances of vague pronoun references, where it is not clear which noun the pronoun is referring to. For example, in the sentence 'Logan plans to travel around Europe with his brother after he graduates,' it is ambiguous whether 'he' refers to Logan or his brother. In the realm of editing focus, particularly about the clear use of pronouns as discussed in Section 20.6, such ambiguities can detract from the clarity of the writing. The goal in editing such text would be to ensure pronouns refer to specific nouns to make the sentence unmistakable. This can be done by rephrasing the sentence to 'Logan plans to travel around Europe with his brother after Logan's graduation' if Logan is the one graduating, or changing it to 'Logan plans to travel around Europe with his brother who will graduate soon' if it is the brother who will be graduating.