____________ is the process of making a thick oxide layer on aluminium.

Correct option is A

• Anodising is an electrochemical process used to create a thick oxide layer on the surface of aluminium and its alloys.
• This oxide layer increases the metal's resistance to corrosion, enhances its appearance, and can also be used to add color through dyeing. • The process is widely used in industries like aerospace, architecture, and automotive.

• Shielding, Sheeting, and Coating are different processes used for protection or covering materials, but they do not specifically refer to the creation of an oxide layer on aluminium.