The correct answer is option 3, Hydrogen fluoride. When it comes to writing on glass surfaces, one of the materials that can be used is Hydrogen fluoride. Hydrogen fluoride is a highly corrosive substance that has the ability to etch or corrode glass. It is often used in various industries for applications such as glass etching, glass cleaning, and as a component of some glass cleaning products. When applied to glass surfaces, Hydrogen fluoride reacts with the glass, causing it to form a rougher surface. This rough surface allows for better adhesion of ink or other substances used for writing.

Let`s analyze the other options provided:

- Option 1: Silicon is not typically used for writing on glass. Silicon is commonly used in the production of glass, but it is not used as a writing tool on glass surfaces.

- Option 2: Graphite is not commonly used for writing on glass either. Graphite is often used as a lubricant or in pencil lead, but it does not have a significant impact on glass surfaces.

- Option 4: Hydrogen iodide is not used for writing on glass either. While it has some industrial uses, it does not have the same effect on glass surfaces as Hydrogen fluoride.

Therefore, the