1.Gerund as a subject: "Improving memory" uses the gerund form as the subject of the sentence, demonstrating a complex grammatical structure.
2.Present participle as an adjective: "Engaging in regular physical activity" uses the present participle "engaging" as an adjective to describe the action, adding depth to the sentence.
3.Relative clause: "A balanced diet rich in brain-boosting foods, such as nuts and fish, provides essential nutrients that support memory" uses a relative clause "that support memory" to add additional information, enhancing the complexity of the sentence.
4.Infinitive phrase as an adverb: "to process and store information effectively" uses the infinitive phrase as an adverb to describe the purpose of adequate sleep, showcasing advanced grammar usage.