Final answer:
In drug use surveys, "sampling" refers to the way that respondents are selected. Different sampling methods can be used depending on the research goals and population characteristics.
Step-by-step explanation:
In drug use surveys, "sampling" refers to the way that respondents are selected. It involves choosing a representative group from the population being studied. There are several methods of sampling, including simple random sampling, stratified sampling, cluster sampling, and systematic sampling. The choice of sampling method depends on the research goals and the characteristics of the population being studied.