Final answer:
Neither Powder Bed Fusion (PBF) nor Stereolithography (SLA), the options given, use molten material to start with. PBF uses a powder to melt or sinter, while SLA uses a liquid resin that is cured. The processes that use molten material as a start like FDM or DMD were not options provided.
Step-by-step explanation:
The student asks about the Additive Manufacturing (AM) processes that utilize molten material as the starting material. The correct options among those given are none. The two processes specified, Powder Bed Fusion (PBF) and Stereolithography (SLA), do not begin with molten material. Instead, PBF uses a fine powder (often metal or plastic) which is melted or sintered layer by layer with a laser or electron beam. SLA, on the other hand, uses a vat of liquid photopolymer resin which is cured using a UV laser. For AM processes utilizing molten material, one might look into technologies like Fused Deposition Modeling (FDM) or Direct Metal Deposition (DMD), which are not listed in the question.