The answer is the first bubble, reproduction
Because of the industrial revolution farmers moved to the cities for a better life. However this did not happen because the area was very polluted and badly built homes meant lots of disease and death. Many people moved out of the villages so the farmers would have less business. I would say the last option is correct.
Metalworkers: They made weapons and cups.
Architecture: Designed Temples.
Music: Brought joy to gods and people who liked music.
