Here's why:

* Rust is iron oxide. It forms when iron (Fe) reacts with oxygen (O2) in the presence of water (H2O).

* Oxidation is a chemical reaction where a substance loses electrons. In the case of rust, iron atoms lose electrons and combine with oxygen atoms to form iron oxide (Fe2O3), which is what we know as rust.

So, the formation of rust is a clear example of the chemical property of oxidation.