1.Noun phrase as subject: "Disagreements over technology use" serves as the subject of the sentence, using a complex noun phrase to introduce the topic, enhancing the depth and complexity of the expression.
2.Present participle as an adjective: "fearing negative impacts" uses the present participle "fearing" as an adjective to describe parents' concerns, adding complexity to the sentence structure.
3.Contrastive conjunction: "Conversely" is used as a contrastive conjunction to introduce the opposing perspective of children, demonstrating the ability to use complex sentence structures and diverse expressions.
4.Present participle phrase as adverbial: "surrounding social media usage and online safety" uses the present participle phrase as an adverbial to describe the issues, adding complexity to the sentence.