We can see here that upon reviewing the sentences provided, the sentence that requires revision for clarity and improvement is:
B) The main character, a young boy who wanders away and gets lost in the woods.
This sentence lacks a clear structure and complete thought. It seems incomplete as it doesn't convey the main idea or event in a coherent manner. To enhance clarity, it can be revised to something like:
"The main character is a young boy who wanders away from his family and becomes lost in the woods."
This revision provides a clearer description of the main character and the pivotal event in the story, making it more comprehensible for the reader.
The complete question:
Josie is proofreading her book report using this checklist. Which sentence needs revision?
A) To find out what happens, you will have to read the book.
B) The main character, a young boy who wanders away and gets lost in the woods.
C) The dark of night surrounded him, and the eerie sounds of the forest frightened him.
D) Arthur's family didn't realize that he was missing until they completed their hike.