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.
<span>Asad's first-grade class is diverse: there are two students from Korea, five students from South America, two students from the united states, three students from Kuwait, a student from Mexico, two students from England, and five students from western Europe. Assad's class is:</span>
Answer: Protestant Reformation
Explanation: Hope this helps!
A galaxy I think but that seems to simple ?