Answer:
choose between two outcomes that are both desirable
Explanation:
One reason it was a health threat is it caused teeth to become ground down which would then lead to infections. The same was true with their eyes and lungs, sand would be blown into their eyes or inhaled into their lungs and then could cause infections.
The correct answer is prosocial behavior.
As the term itself says, prosocial means 'for the society.' So it is the type of behavior that will bring good things for individuals in a particular society, as well as the entire society in general. Actions that fall under this category could include donating, volunteering, sharing, etc.