The Mississippi River delivers runoff from farms in the Midwest to the waters of the Gulf of Mexico. Excess fertilizer enters the Gulf, resulting in a Dead Zone, or water area that cannot support life. As a shrimp farmer, you are concerned about how this affects the of the Gulf.

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.