Which of the following statements provides the most accurate investigation of why Ethiopia and Egypt have run into conflict over resources management?

1) Ethiopia’s building of a dam on the Nile could impact Egypt’s use of the Nile because they lie downriver.
2) Ethiopia’s use of fossil fuels to fuel economic growth frustrate Egypt, which shares the same scarce resources.
3) Ethiopia’s construction of a power plant will pollute the river systems used by Egypt because they lie downriver.
4) Egypt’s use of fossil fuels causes an enormous amount of pollution to hang over Ethiopia’s cities, causing health issues.

The most accurate investigation statement of why Ethiopia and Egypt have run into conflict over resource management would be: 1) Ethiopia’s building of a dam on the Nile could impact Egypt’s use of the Nile because they lie downriver.

The most accurate investigation of why Ethiopia and Egypt have encountered conflict over resources management is statement 1: "Ethiopia’s building of a dam on the Nile could impact Egypt’s use of the Nile because they lie downriver." This statement highlights the geographical aspect of the conflict, as Ethiopia's dam construction could potentially affect Egypt's access to the Nile, since Egypt is situated downstream.