Answer :
Final answer:
Among the options given for gas torch applications and additions, Flashback arrestors are vital for preventing flames from traveling back into the gas supply, making them a key safety component.
Explanation:
The question relates to the safety equipment used in conjunction with gas torches, which are commonly used for welding and cutting applications. Among the options given, B) Flashback arrestors are directly related to the operation and safety of a gas torch system. Flashback arrestors serve a crucial role by preventing a flame or explosion from traveling back into the gas supply, offering a critical layer of safety during operations. Welding goggles, leather gloves, ear protection, and steel-toe boots are also essential personal protective equipment (PPE) that offer protection against various hazards associated with welding and cutting operations. However, when specifically considering additions and applications that play a direct role in the functioning and safety of gas torches themselves, flashback arrestors stand out.