1.Present participle as an adjective: "promoting physical activity" uses the present participle "promoting" as an adjective to describe the role of public parks, adding complexity to the sentence.
2.Relative clause: "which are essential for combating the sedentary lifestyles" uses a relative clause to provide additional information about jogging, walking, and cycling, enhancing the depth and detail of the sentence.
3.Infinitive phrase as an adverb: "to incorporate physical activity into their daily routines" uses an infinitive phrase to explain the purpose of the accessibility and free use of parks, demonstrating advanced grammar usage.
4.Adverbial phrase: "thereby significantly improving their overall physical health" uses an adverbial phrase to show the result of incorporating physical activity, adding complexity and clarity to the sentence.