By the nineteenth century, a period of intense scientific discovery was well underway. Remarkable advances in science and medicine helped to lift people out of wretched poverty by enabling people to explore opportunities in industry. These advances also enriched their lives, empowered them with knowledge, opened their eyes to new worlds, and eventually unleashed complex forces which would topple the feudal dynasties, fiefdoms, and empires of Europe. According to the passage, which key term is found in the first passage?
1) scientific discovery
2) advances in science and medicine
3) wretched poverty
4) feudal dynasties, fiefdoms, and empires of Europe
