what is the main reason for archiving project documents?\nto save time and effort on building future…

Brief Explanations:

Legal requirements often mandate proper archiving of project - related documents for accountability, auditing, and compliance purposes. While saving time for future projects and saving lessons learned are benefits, compliance with legal regulations is a primary and over - arching reason. Regulatory requirements are also important, but legal requirements are more encompassing in this context.

Answer:

To comply with legal requirements regarding archiving project documentation.