Final answer:
The ArcGIS user should export the layer and attribute information in PDF format in order for the colleague to view the information.
Step-by-step explanation:
The ArcGIS user should export the layer and attribute information in PDF format in order for the colleague to view the information. PDF (Portable Document Format) is widely used for sharing documents because it can be viewed on different platforms and devices, regardless of whether the recipient has the software used to create the document. PDF files preserve the formatting and layout of the original document, making it an ideal choice for sharing maps and attribute information.