At construction sites, workers often reduce erosion by a. moving excess sediment back to its original location c. planting trees b. spraying water on bare soil d. all of the above

Answer;

All the above

Workers at construction sites often reduce erosion by;

Moving excess sediment back to its original location Planting trees Spraying water on bare soilExplanation;Soil erosion is a naturally occurring process which involves the wearing away of the topsoil by natural forces such as wind, water or other forces associated with farming.Construction of roads and buildings results to large amounts of soil erosion around the world. It is therefore important to put measures that would help reduce soil erosion at construction sites. These measures uses principals of soil control such as implementing sediment control, limiting soil exposure, reducing the runoff velocity, and modifying topography among others.

In order to find the answer you must plug in the information to the frequency equation, . C is the speed of light, 3.0 x 10^8. By plugging in the information you receive a frequency of 3.0 x 10^7 hz.