Answer:
The Mexican Revolution destroyed the old government and army of the dictator Porfirio Diaz, and eventually changed the country's economic and social system. The Mexican government recognized the labor unions and peasants organizations, and promoted their organization, and their incorporation into the state-party.
I can help with number one...I am not an expert but I think it is C. Sorry is that is wrong but I hope that helps
Which statements are you talking about?
One of the main reasons why governments need ambassadors to foreign Countries is because the ambassadors have an intimate relationship with many high ranking officials in said country--making it easier for the two countries in question to enact trade deals and other mutually beneficial measures.
Rivers, and flat plains.
Rivers proved pivotal for settlements to grow since it provides a means of water for growing crops, a means of produce which people can consume. Rivers also are a means of transportation and a geographic barrier against attack, albeit slight.
Flat plains also proved viable for settlements because of how easy they were to traverse, coupled with it being easier to farm on said land.