Fact 1: Alight bulb requires electrical energy to produce light.

Fact 2: Electrical energy refers to energy associated with the flow of electrons.

Given the two facts above, answer the question "what does a light bulb require to produce light?" with the following options: 
- flow of electrons
 - flow of neutrons
 - the sun
 - adding heat
 - hydrogen and oxygen
 - an electron lens
 - h2o
 - chemical messengers


 

 flow of electrons        