PART 1 - While aids, treaties, and alliances all connect different countries one way or another in a positive way, their main difference is how strong these bonds are. For instance, aids (usually a gift of food, ammunition, etc.) are the least strong, treaties (usually written agreements) are the second strongest, and alliances (usually a partnership in war and other businesses) is the strongest.
PART 2 - The reason the United States of America is not included on this graph is because they had not yet made any treaties, alliances, or aids at that time period. If the graph had been a later model, the United States would have been included.
PART 2 - The reason the United States of America is not included on this graph is because they had not yet made any treaties, alliances, or aids at that time period. If the graph had been a later model, the United States would have been included.