A patient exposed to cyanide fumes requires ALS support primarily because:

When a patient is exposed to cyanide, it is critically important to provide advanced life support (ALS) because of the availability and effectiveness of specific antidotes that can counteract the toxic effects of cyanide. Paramedics are trained and equipped to administer these antidotes, which are essential in managing cyanide poisoning effectively. The primary antidotes for cyanide toxicity include hydroxocobalamin and sodium thiosulfate, which can help neutralize the cyanide and support the patient’s recovery.

The other options suggest methods that either do not address the immediate life-threatening nature of cyanide exposure or could be inappropriate in this scenario. Inducing vomiting could lead to additional complications and is not a recommended treatment for cyanide poisoning. The assertion that oxygen would worsen the patient's condition is incorrect; in fact, administering high-flow oxygen is often part of the treatment protocol for cyanide toxicity, as it helps deliver oxygen to tissues that are deprived due to the toxic effects of cyanide. Similarly, while IV fluids can be important in managing certain emergencies, they do not actively help in detoxifying cyanide from the body. Therefore, the capability to administer a specialized cyanide antidote is a key reason for the necessity of ALS support in this case.