Describe the North Central Plains region of Texas. In which part of Texas is this region located? What major cities are in this region? What natural resources are found in this region?

Extending from the Atlantic Ocean to beyond the Rio Grande. Its characteristic rolling to hilly surface covered with a heavy growth of pine and hardwoods extends into East Texas. In the increasingly arid west, however, its forests become secondary in nature, consisting largely of post oaks and, farther west, prairies and brushlan

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.