Concept:A product of the construction industry is any material or item directly used in building and construction work.Explanation:Look at each option and decide if it belongs to construction work.A piece of cloth is a textile product.A bag of cement is a basic building material used for making concrete and mortar.A television is an electronic appliance.A chair is a piece of furniture.Therefore, the item that belongs to the construction industry is the bag of cement.Answer:B. bag of cement