Final answer:
Brazing and soldering enable joining of dissimilar metals due to their lower temperature process compared to welding, which does not melt the base materials but uses a melted filler to form a bond.
Step-by-step explanation:
Because brazing and soldering require much less heat than welding, they allow for the joining of dissimilar metals. This is possible since the lower temperatures do not melt the base metals; instead, a filler metal is melted and flows into the joint, bonding the parts once cooled. Brazing and soldering also minimize the thermal distortion of the workpiece, maintain the properties of the base metals, and can be performed with various heat sources including torches, furnaces, or induction heating.