I think d
Rust is a molecule that is composed of two element As the rust forms on the surface of the iron, it flakes off to expose more iron, which will continue to rust. Rust is clearly a substance that is different from iron. Rusting is an example of a chemical change
With photography the american an public finally knew about the horrible working conditions they where forced into
The answer is C former slaves fighting in the Union army were essential to several Northern Victories.
