Silent Spring brought attention to the effects of pesticide pollution on wildlife.
It was the use of assembly lines
The two big advantages in <span>education during the middle ages were the making of universities for higher studies and the style of writing with lower case letters. There were other advances as well but these two were the most significant advances. I hope that this is the answer that has come to your help.</span>
C. It extended the abolitionists power to operate the Underground Railroad
