Final answer:
Thomas Edison was curious as a child because of his early exposure to the telegraph industry and his interest in telegraph technology.
Step-by-step explanation:
Thomas Edison was curious as a child because of his early exposure to the telegraph industry. As a young boy working aboard trains, he became interested in telegraph technology and started tinkering with it.
This curiosity eventually led him to devote himself full time to lab work as an inventor, where he went on to invent numerous groundbreaking devices that are still used today.