Which type of sample is taken to reflect conditions at a specific moment?

The type of sample that is taken to reflect conditions at a specific moment is a discrete sample. Discrete samples are collected at a particular point in time and place, providing immediate data that is relevant for that specific moment. This makes them particularly valuable in CBRN reconnaissance operations where understanding the current situation is crucial for effective decision-making.

In contrast, a composite sample involves collecting multiple samples over time or from different locations and then combining them in order to gain a more averaged or generalized understanding of the area or situation. This type of sampling may overlook momentary changes or localized conditions.

The term "team" does not pertain to a type of sampling and instead refers to the groups involved in reconnaissance operations. Lastly, representative samples are meant to provide an overview of a larger area or group and may not give the precise conditions at one specific moment, as they aim to reflect broader patterns rather than immediate environmental factors. Therefore, the discrete sample's focus on capturing data at a specific time makes it the correct choice for this scenario.