Concept:Steaming uses hot steam to cook food, so the lid helps keep the steam and heat contained.Explanation:A tight-fitting lid traps the steam inside the saucepan.This prevents heat and steam from escaping quickly.It keeps the water at a steady steaming temperature so the food cooks properly.It does not directly enhance flavour, prevent breaking, or increase the water’s normal boiling temperature in this context.Answer:D. maintain the temperature of water.