The most crucial to a reader's understanding of an expository text would be how effective the text is written to convey a clear and concise idea to the reader. It should be able to penetrate a reader's comprehension well and establish a clear way to get the point across.
DON’T SAY THIS EXACTLY, REPHRASE AND MAKE BETTER, IM JUST GIVING IDEAS
The author could use more data especially for the 3rd paragraph, like about how much time is spent in community service, the author should use more data to try to show the reader the positives and negatives of the community service work