Which of the following are the three types of CBR surveys?

The correct response identifies the three types of Chemical, Biological, and Radiological (CBR) surveys as Point, Route, and Area.

Point surveys focus on specific locations where there may be a heightened risk of contamination or exposure. This type of survey allows teams to collect detailed measurements at fixed points, providing valuable data for assessing potential CBR threats in those areas.

Route surveys assess predetermined pathways, such as roads or transit corridors, to identify any CBR contamination along those routes. This is essential for safe movement of personnel and equipment in areas where CBR threats might exist.

Area surveys encompass a broader scope, evaluating a wide expanse of land to detect and assess potential CBR hazards across larger territories. This type of survey is vital for understanding the contamination extent in various environments.

The other options do not accurately represent the established categorizations of CBR surveys. For instance, the use of "Line" and "Zone" in some of the other choices does not align with the standard terminology associated with CBR surveys. Thus, recognizing the correct categorization as Point, Route, and Area is important for understanding how CBR threats are assessed and managed effectively.