Final answer:
A fire extinguisher is the essential safety item that should always be available in case of fire, especially in laboratories or areas with potential fire hazards.
Step-by-step explanation:
The safety item that should always be available in case of a fire is a fire extinguisher. When working in a laboratory or any place with potential fire hazards, such as with Bunsen burners or flammable chemicals, it is crucial to know where the fire extinguisher is located. It's also important to ensure that you work in a well-ventilated space, keep loose clothing and hair tied back, and be aware of the location of other safety equipment like an eyewash station. In addition, there should be a readiness to respond to a fire with appropriate materials, and to follow safety instructions carefully, such as those detailing the handling of flammable chemicals and the proper use of a fire extinguisher.
Fire safety is critical, and being prepared with safety guidelines is important for preventing and reacting to potential fires. Always be alert and careful when handling materials that could be hazardous, and make sure that all equipment, like Bunsen burners, are turned off at the end of practice—minimizing any related risks.