Final answer:
The insufflator is the machine that infuses CO₂ gas into the abdominal cavity, distinct from electrosurgical units, lasers, or autoclaves, which have other specific medical uses.
Step-by-step explanation:
The machine that infuses CO₂ gas into the abdominal cavity is a insufflator. This device is used in laparoscopic surgery to create space inside the abdomen by inflating it with carbon dioxide gas, which grants the surgeon better visibility and space to work. This is essential because it lifts the abdominal wall away from the internal organs, reducing the risk of accidental damage. The correct answer to the question is therefore c) Insufflator.
An electrosurgical unit is used to cut tissue and control bleeding by using electric current, a laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation, and an autoclave is used for sterilizing equipment by using steam under pressure. None of these devices are designed to infuse CO₂ gas.