Question

what contribution did thomas edison make to the lightbulb? he invented the process to make a bulb from glass. he developed a filament that would burn out slower. he discovered how to harness electrical current.

Explanation:

Thomas Edison developed a carbon - based filament for the light - bulb that could burn for a long time without burning out quickly, making the light - bulb a practical and commercially viable product.

Answer:

He developed a filament that would burn out slower.