The correct answer is A. Lead.
Lead is a heavy, soft, malleable, and ductile metal. It is a post-transition metal that is chemically similar to tin and bismuth, and chemically less reactive than iron. Lead is the main component of lead-acid batteries. It is also used in cable sheathing, radiation shielding, and solder.
Rubber is an elastomeric material that is made from the natural rubber tree. It is a viscoelastic material, which means that it has both viscous and elastic properties. Rubber is used in a variety of applications, including tires, hoses, and gaskets.
Copper is a reddish-brown metal that is an excellent conductor of electricity and heat. It is used in a variety of applications, including electrical wiring, plumbing, and coins.
Iron is a hard, strong, and magnetic metal. It is the most common element in the Earth’s crust. Iron is used in a variety of applications, including construction, machinery, and transportation.
Lead is the most commonly used material for sheaths of underground cables because it is a good conductor of electricity and it is resistant to corrosion. Lead is also relatively inexpensive and easy to work with.