Which items describe the central plateau? (multiple choice) -Rio Grande
-pleasant climate
-flat, high land surrounded by mountains
-Altiplano Central
-population center of Mexico
-snow-covered mountains
-tropical

In a study, people were asked to imagine simple occasions that made them happy and to remember events that made them feel proud about themselves. it was observed that the subjects developed an increasingly positive attitude. these changes are known to be healthy, leading to greater physical activity and reducing unhealthy habits. based on this excerpt, we can conclude that a positive attitude .