The correct answer to this open question is the following.
Here we have a statement. There is no question at all. If this is a true or false question, then the answer is true.
It is true that Mississippians created large towns near rivers that featured a central plaza, residential zones, and defense structures.
Furthermore, the Mississippians spend most of the day doing activities outside, they just got home to sleep and rest, and they started all over again the next day. They were hard-working people. They were good traders and used the Mississippi River to navigate and transport their products to many towns that were located in the regions. They used to trade with other Native American Indian tribes.
The legislative branch of the federal government, composed primarily of the U.S. Congress, is responsible for making the country’s laws. The members of the two houses of Congress—the House of Representatives and the Senate—are elected by the citizens of the United States.
This number would greatly increase, as there are many nations that don't have their own their own country. Some are part of a bigger country (the Tamils in India) and some are distributed among many countries (the Kurds)
Recognizing all those nations could increase some conflicts, such as that between the Kurds and Turkish in Turkey.
I think that a good definition should acknowledge that some nations have independent states and some are part of another state - the defining characteristics should be a sense of unity among the nation.