Final answer:
The replacement of all the contaminated air in a confined area is called a) ventilation. Filtration is a microbial control method that physically removes microbes. The correct answer is ventilation.
Step-by-step explanation:
The replacement of all the contaminated air in a confined area, such as a paint mixing room or paint storage room, is called ventilation. Ventilation involves the exchange of indoor air with fresh outdoor air to remove contaminants.
Filtration, on the other hand, is a microbial control method that physically removes microbes from samples. It is commonly used in hospitals and surgical suites to prevent the spread of airborne microbes through ventilation systems. High-Efficiency Particulate Air (HEPA) filters are often used for filtration.
Decontamination involves the removal or neutralization of contaminants from surfaces or objects. Isolation refers to separating infected individuals from healthy ones to prevent the spread of diseases. Therefore, the correct answer to your question is a) Ventilation.