Which tool in ArcGIS Pro is used to assign projection information to a file?

The choice of Define Projection is correct because this tool is specifically designed to assign a coordinate system to a dataset that lacks this information. In ArcGIS Pro, when a file does not have associated projection information—common in files received from various sources or older systems—using the Define Projection tool allows users to specify which coordinate system the data should be interpreted in.

This tool does not transform or alter the data itself; rather, it simply annotates the data with the correct spatial reference. This is essential for accurate mapping and analysis, as having the correct projection information ensures that the dataset aligns properly with other spatial data layers.

The other options, while potentially sounding relevant, do not serve the same function as Define Projection. For instance, the Assign Projection Tool and Projection Manager may imply broader capabilities or focus on adjusting projections rather than correctly defining the spatial reference of a file. The Projection Utility is not a recognized standard tool in ArcGIS for this purpose. Understanding this distinction is critical for effective GIS data management and ensuring spatial accuracy in analyses.