Question

1. how did thomas edisons invention of the light bulb most change american life? it replaced steam power as the main source of energy. it led to faster railroad construction. it caused cities to rely less on electricity. it made factory work safer and allowed longer working hours.

Explanation:

The light bulb provided a safer and more reliable source of light compared to previous methods like gas lamps. This allowed factories to operate for longer hours as they no longer had to rely on natural light or less - safe lighting options. Steam power was mainly used for engines (e.g., in trains, early industrial machinery) and not directly replaced by the light bulb. The light bulb increased the demand for electricity, not decreased it. And there is no direct connection between the light bulb and faster railroad construction.

Answer:

It made factory work safer and allowed longer working hours.