Which of the following is an example of a non-structural BMP?

A non-structural best management practice (BMP) focuses on management strategies or activities that do not rely on physical structures to mitigate stormwater runoff and pollution. Education programs for pollution reduction are considered non-structural BMPs because they aim to inform and empower the community or specific groups about best practices for reducing pollution and managing stormwater more effectively. By increasing awareness and promoting behavioral changes, these educational initiatives can lead to significant improvements in water quality and stormwater management without the need for complex infrastructure.

The other options involve the creation or implementation of physical structures designed to manage stormwater. Retention basins and infiltration trenches are designed to collect and infiltrate runoff, while rain gardens, although beneficial for absorbing water and reducing runoff, do involve physical layout and planted areas specifically designed for stormwater management. Thus, these options do not fall under the category of non-structural BMPs.