Which detail from "Thomas Edison: The Master of Improvement” supports the big-picture idea of the passage? Humphry Davy created the first electric light and shared his design with Edison.
Unlike Davy and Swan, Edison had no formal schooling. He was quite sickly as a child, so his mom taught him at home.
That way, all of those long-lasting Edison bulbs would have a ready supply of the electricity they required.
Edison was successful because he persevered through challenges to reach his goal of creating a practical lightbulb.