Does " she earned many young readers" make sense?

For english i have to find 4 errors in each diary post

Once you have finished revising your peer’s essay, continue to demonstrate your understanding of grammar and punctuation by writing an essay containing all of the grammatical concepts outlined above. your essay should be short, just 250 words, and it can be written on any subject. it should contain an example of parallel structure, an example of every type of phrase and clause outlined in this lesson, an example of two independent clauses connected by a semicolon, and an example of a colon. if you are struggling to come up with an idea for an essay, consider writing it about the themes present in one of the texts you have read already.

The essay sea stars by barbara hurd. what point is the author making by comparing a sea star missing an arm to a human losing a limb?