Texas is a state located in the southern center of the United States. It limits to the north with Oklahoma, to the northeast with Arkansas, to the east with Louisiana, to the southeast with the Gulf of Mexico, to the southwest with Mexico and to the west with the state of New Mexico.
It lets you have specific location on the map.
There are limited amounts of resources in a general area. Some civilizations may not have the ability to produce resources that they need. That makes 2 routes:
1) cooperation: They can cooperate with another people group that lives in a different region and trade with them
2) conflict: They can attack/raid another people group in a different region for the resources
hope this helps
Physical signs : Headache
Emotional signs : Happy,guilty,
Behaviour signs : loss of interest, personality