Final answer:
The wide stretch of land east of the Sierra Madre Oriental is called the Mexican Altiplano. It is a plateau located between the two mountain ranges in Mexico, and it is known for its fertile farms and diverse geographical features.
Step-by-step explanation:
The wide stretch of land east of the Sierra Madre Oriental is called the Mexican Altiplano. It is a plateau located between the Sierra Madre Oriental and the Sierra Madre Occidental mountain ranges in Mexico. The Mexican Altiplano is divided into northern and southern sections, with the northern section dominated by the Chihuahuan Desert. It is known for its fertile farms, productive ranch land, and diverse geographical features.