a radio station asks its listeners to call in their opinion regarding the closing of fire stations in the…

Brief Explanations:

The sampling method is voluntary - response sampling. Listeners with stronger opinions about the closing of fire stations are more likely to call in. This over - represents those with extreme views and under - represents those with more moderate views or those who are less interested in the issue.

Answer:

Sampling method: Voluntary - response sampling. Reason for bias: Listeners with stronger opinions are more likely to participate, leading to a non - representative sample.