What are the practical results of space exploration? improved pesticides
weather satellites
faster cars
improved communications
better computers
ultra-strong plastics

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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 .