Entering a lesson late can cause some disruption issues, for example, the teacher usually has to tell the latecomer to sit down, and re-explain the work. Perhaps, the teacher may ask somebody else to explain it, which can disrupt their learning too. This can therefore make it worse for the child explaining, or the other children (if the teacher explains the work) as the teacher can’t be in two places at one. In conclusion, students should turn up to lesson on time or early.
Answer:
It helps the reader visualize and feel like they are experiencing what it's like in Winston.
Explanation: The detailed description makes you think about it and imagine how it would look like.