Final Answer:
Welding is the most important joining process for c) Metals.
Step-by-step explanation:
Welding is a joining process that is primarily associated with the fusion and bonding of metallic materials (Option C). It involves the application of heat to melt and join metals, creating a strong and durable connection. Welding is extensively used in various industries, including construction, manufacturing, and automotive, where metals are prevalent.
Options A (Plastics), B (Ceramics), and D (Wood) are typically joined using other methods such as adhesives, mechanical fastening, or specific bonding techniques tailored to the properties of these materials. While welding can be employed for certain plastics and ceramics, it is fundamentally associated with metals as the most crucial material for this joining process.
Option C is the answer.