What is produced when iron-bearing silicate minerals in the desert landscape oxidize?

When Iron-bearing silicate minerals in the desert landscape oxidize; it will produce a color to the stones and soils that looks like a rust color. Oxidize means an element is chemically combined with oxygen. So in this situation, the Iron bearing silicate minerals was chemically combined with oxygen, that’s why it produces a rust colored stain. It is called as rust colored stain because it basically looks like a rust stain, it is color orange that caused stain the stones and sands in the desert.

The answer to this is the 3rd choice!

It could possibly be beneficial if the experiment is successful.