Analogy Breakdown: Material Treatments

The question uses an analogy format: Material A is treated by Process B, similar to how Material C is treated by Process X.

• Aluminium : Anodisation: Anodisation is a surface treatment that increases the thickness and durability of Aluminium.
• Glazing : X: Glazing refers to glass panes. We need a process applied to glass that improves its properties, similar to anodisation for aluminium.

Evaluating Glazing Treatment Options

Consider the provided options for Process X applied to Glazing:

• A: Hard coating: This is a surface finish applied to glass to enhance scratch resistance. It modifies the surface properties, much like anodisation.
• B: External cement plastering: This is a building construction method for walls, not related to glass treatment.
• C: Tempering: This is a heat treatment process that strengthens glass and makes it safer upon breakage. It significantly improves the glass's physical properties.
• D: Free-standing vertical greening: This involves growing plants on vertical surfaces and is unrelated to glazing.

Finalizing the Analogy

Both Hard coating and Tempering are processes that enhance the properties of glazing (glass). They are analogous to anodisation, which enhances Aluminium.

Therefore, the correct options representing X are Hard coating (A) and Tempering (C).