In Zeneida’s speech about why we should use a refillable water bottle instead of buying disposable water bottles, her first main point is about the environmental costs of disposable water bottles. Zeneida makes sure that her two subpoints for her main point are equally significant and are given equal time. Her first subpoint is about how much plastic from water bottles is thrown away each year, and her second subpoint is about the amount of fuel used to create and transport bottled water each year. Which tenet of outlining is Zeneida following when she makes sure her subpoints have the same significance?