The audience for a piece of writing is the general public, and the purpose is to inform people about the risks of not exercising regularly. what form of writing and what kind of supporting details best support this audience and purpose?

Academic essays (facts and figures supporting the risks of not exercising) would be the answer. This is because it has facts supporting your claim, as well as the fact that the format of an academic essay is usually more likely to be read by the general public because they know academic essays are typically only the facts. Hope this helped!