Why did we use an AttributeRenamer in the exercise workspace?

• A. We wanted to rename the flood risk variable from FloodRisk to DangerZone
• B. The AttributeRenamer calculated the value of FloodRisk
• C. We wanted to expose the _band{}.value list attribute created by the PointOnRasterValueExtractor so we could view Elevation
• D. We needed to rename a field for labeling in the output

Answer: (C)

AttributeRenamer is used to change attribute names so you can see and work with data produced by transformers. In this exercise, the PointOnRasterValueExtractor creates an attribute named _band{}.value that holds the elevation sampled from the raster for each point. Renaming that attribute to something readable like Elevation makes it easy to view, select, and use the raster-derived value in further steps (such as labeling or analysis). The other options miss the actual purpose here: renaming a flood risk field isn’t what’s being done, AttributeRenamer doesn’t calculate values (it only renames), and renaming purely for labeling isn’t the specific need when the goal is to expose the raster-sampled value for viewing.