Answer:
water
Step-by-step explanation:
Water is a theoretically free good that can be found on a daily basis in many public places, such as squares, schools, libraries, etc. However, in fact, even water is not exactly a free item, as there is a production cost that involves plumbing and treating water to consumption. This cost is charged to an account that the government pays with our taxes, that is to say we all pay for water and any other theoretically free goods.