Answer:
Mainly Carbon, Oxygen, Hydrogen, Nitrogen, Magnesium, Aluminium, Iron and Chromium.
Explanation:
Hello,
In this case, it is widely known that backpacks have are made up of special fabrics such as Cordura, Cotton canvas, Nylon, Polyester and PVC fabrics which have the following elements in common: Carbon, Oxygen, Hydrogen and Nitrogen. which provide backpacks waterproofness, resistance and stability.
In addition, some metals such as magnesium and aluminium as diecasts or directly stainless steel (containing iron, carbon, chromium, etc) are used to make the zippers.
Best regards.
