Answer:
Agriculture (and associated population increase) resulted in population seventies and crowding. Accumulation of waste and increased transmission of microbes owing to crowding provided the conditions conducive to the spread and maintenance of infectious disease.
Explanation:
Agricultural has 12 letters
It was the ancient Persian empire my good sir <span />
1.
Rosie the Riveter
2.
Stalingrad
3.
D-Day
4.
Harry Truman
I hope this help you.
