An incandescent light bulb converts electricity into light by sending electricity through a filament, and standard filaments are made of tungsten. Given these facts, what does an incandescent light bulb use to convert electricity into light  among the following options:
- energy
 - light
 - heat energy
 - Tungsten
 - heat
 - Neon gas
 - Coal
 - Helium


 

    Tungsten     