1. Past tense: The answer consistently uses the past tense (was, struggled, needed, found) to describe experiences in secondary school, which is appropriate for talking about past events.
2. Use of complex sentences: The answer combines ideas using conjunctions like "so" and "because," showing the ability to create longer, more detailed sentences.
3. Use of modal verbs: "couldn't really see" uses the modal verb "could" to express ability in the past, adding nuance to the explanation.