Final answer:
Arc welding is predominantly used in the fabrication industry to produce automotive parts and sub-assemblies, recreational and exercise equipment, among other items.
Step-by-step explanation:
Welding is a fabrication process that involves joining metal materials using heat and solder. In the context of the market that makes use of arc welding to produce automotive parts and sub-assemblies, along with recreational equipment, office furniture, lawn and garden equipment, and exercise equipment, the correct answer is 'd) Fabrication'. Arc welding is a versatile process often employed in the fabrication industry because it is efficient, produces strong joints, and can be used on a variety of metals and alloys. This weld method is particularly common when producing parts that require precision and strength, which is essential in the automotive sector, as well as in the creation of durable recreational and exercise equipment.