Answer:
Agriculture allowed people to stay in one place, and increased food production caused the population density to expand far beyond levels that could be sustained by hunting and gathering alone. This growth in population density provided a critical mass of people to sustain and spread contagious infectious diseases.
The dominant language in South America is Portuguese.
Answer:
I saw this question on my recent test
B. Both were common governments for early river valley civilizations.
This was my answer and Got it right. Hope This helps you! :0) lol
Spain for the majority of the next 300 years. This considering it owned everything from Terra del Fiugo to San Francisco.
