The correct option is D.
The development of agriculture opened the way of civilization for native Americans in Mexico and South America. The cultivation of maize in large quantity especially brought about trading with neighboring cities and towns and open up irrigation system and increased the population density of Mexico and South America.
Because of climate change and drought wich caused the fall of the mongol empire thats also how it change over time
<span>The role of public recreation at the local level is increasingly one of <u>human</u><u /> service.
Human service serves to meet all the needs that humans may have. Core services have to do with computers, as well as computer services, naturally. Public services have to do with the government taking care of its people.</span>
