Correct Answer: metals are good conductors of heat

Solution : The correct option is metals are good conductors of heat.

On a cold day, the metal cap of a pen gets significantly colder than its plastic body since metals are good conductors of heat. This implies they can transport heat more efficiently than other materials. On a chilly day, the outside air is substantially colder than the inside air. When the pen's metal cap is exposed to cold air, it swiftly transfers heat away from the pen and into the air. This causes the cap to seem cooler than the plastic body, which is a poor heat conductor. On a hot day, the reverse is true. The metal cap will conduct heat away from the pen faster than the plastic body, making it seem colder to the touch.