The statement that provides the most accurate investigation of why Ethiopia and Egypt have run into conflict over resource management is:
Ethiopia’s building of a dam on the Nile could impact Egypt’s use of the Nile because they lie downriver.
This reflects the significant concerns regarding water resource management, particularly related to the Nile River, which is crucial for both countries. Ethiopia's construction of the Grand Ethiopian Renaissance Dam (GERD) has caused tensions because it has the potential to affect the flow of the Nile River, which Egypt relies on for a substantial portion of its water supply.