Since this is an in-class essay you want to make sure that you give yourself enough time to actually get to the bulk of the essay. My suggestion would be to start with an experience from your life or background. The prompt mentions "variety of activities available to those living in and near the cities" start off by talking about some programs you know of or that are available to you. This will in the long-run help you transition into your position statement, and it will also help you come "full circle" in your conclusion!
Good Luck!
Neha Pirwani