Participles as subject complements: "Trusting kids with their phones" where "Trusting" functions as a present participle, used as a subject complement, describing trusting the behavior of children, demonstrating advanced grammar usage and sentence complexity.
Infinitive structures expressing purpose: The infinitive structures in "to show they can handle" and "to make smart decisions" express purpose and result, showing the opportunity for children to demonstrate abilities and make decisions, showcasing the complexity and logic of the answer's structure.
Adjectives as predicate complements: In "A balanced approach is supportive" where "balanced" is used as an adjective as a predicate complement, describing the characteristics of the "approach," reflecting the accuracy of expression and complexity of language.