Answer:
The geography of the Southwest region led to the pre-Columbian construction of dams, canals, and pueblos.
Step-by-step explanation:
The Southwest is one of the major geographical regions of the United States, spanning from the States of California to Colorado and south to the Mexican border. For the main part of it, this region is defined by an arid to semi-arid climate that presents low precipitations all year-around. Water, however, can be found the Southwest in the form of rivers that cut through the semi-arid lands. It was surrounding most of these rivers that during the Pre-Columbian Era, people started to build dams, canals, and pueblos, in order to live nearby the river. Canals and dams provided efficient movement and connection between different settlements at the same time that they played a key role in water management, a still very important factor in the Southwest region.