Answer: After school, many students play football, read books, and some relax with video games.
Explanation: parallelism or parallel structure is a literary device that consists in the repetition of the grammatical structure of different words or phrases in a sentence or paragraph, in order to emphasize an idea or to create an impact in the audience. In the given sentence we can see an example of faulty paralellism because the listed elements don't have the same structure (the verbs aren't in the same tense). To correct that we need to change "reading" for "read."