A doorbell converts electrical energy into sound.
Electricity is a kinetic energy.
A doorbell converts  kinetic  energy into sound.
A doorbell converts _ into sound
Options:
1: a hydraulic system
2: rays or beams
3: deoxyribonucleic acid
4: kinetic energy
5: encoded information
6: sensory neurons
7: circulatory systems
8: Loud noises