Answer the following question given this paragraph: 

If a substance is corrosive, it can eat through objects. Many scientists have to work with chemicals that are corrosive or otherwise dangerous. That's one reason that following safety precautions in the laboratory or field is very important.


Q: What kind of harm does a corrosive substance cause?

 Choices:

- Builds a crust

- Attracts dust

- Rust objects

- eats through objects

A:
eats through objects
