1.Noun phrase as subject: "an over-reliance on gadgets" serves as the subject of the sentence, using a complex noun phrase to describe a disadvantage, enhancing the depth and complexity of the expression.
2.Causal conjunction: "when these devices malfunction, it can lead to inconvenience" uses the causal conjunction "when" to connect two clauses, showing cause and effect, and adding complexity to the sentence.
3.Adjective phrase as a postmodifier: In "expensive repair costs," the adjective phrase "expensive" functions as a postmodifier to modify "repair costs," adding descriptive power and complexity to the sentence.
4.Parallel structure: "sedentary lifestyle, which can have adverse health effects" emphasizes two key consequences of dependency through parallel structure, showcasing a complex sentence structure and diverse expression.