What should always be used when dealing with biological hazards?

Using protective gear is essential when dealing with biological hazards because these hazards can pose significant risks to health and safety. Biological hazards may include infectious materials such as bacteria, viruses, and other pathogens that pose a risk of infection or disease transmission. Protective gear, such as gloves, masks, gowns, and eye protection, helps create a barrier between the hazardous materials and the person handling them. This gear minimizes the risk of exposure and subsequent infection or illness.

When working in environments where biological hazards are present, it's vital to maintain safety protocols to ensure that personnel are adequately protected during their tasks. Protective gear is a fundamental component of these health and safety protocols, allowing responders to manage and investigate scenes effectively while safeguarding their health.

Other choices, while they may be relevant in certain contexts, do not address the immediate need for personal protection against biological hazards specifically. Emergency lights might assist in visibility during a scene investigation, hazardous waste disposal relates to the management of waste post-investigation, and crowd control measures pertain to managing the presence of observers or bystanders rather than protecting the investigator from biohazards.