The correct option is C Waste
Plants release oxygen, carbon dioxide, and water vapor as by-products. Other waste products of plants includes tannins, alkaloids, resins, latexes, excess ions, nicotine, quinine, caffeine, morphine, and gums. The gums, resins, and latexes once collected, have a wide range of industrial applications. From these plant waste products, useful products can be obtained such as turpentine, paints, varnishes, soaps, cosmetics, surgical goods, golf balls, bubble gum, and rubber. So, the correct answer is option C.