Answer: d. electrical d.thermal
Explanation:
Thermal energy is the energy possessed by a body by virtue of its temperature.
Electrical energy is the energy possessed by an object by virtue of the flow of electrons.
Nuclear energy is the energy stored in the nucleus of an atom.
Potential energy is the energy possessed by a body by virtue of its position.
Mechanical energy is the energy possessed by a body by virtue of its position and motion.
Sound energy is the energy possessed by an object by virtue of vibration of matter.
When an electric iron is plugged, the electrical energy converts to thermal energy which makes the iron hot and thus helps to iron the clothes.