The ecosystem boundary of a drainage basin can be defined by the rivers that divide the basins between counties, cities, and states the amount of water flowing into the basin from a mountain the streams that flow into the basin local legislative decisions designed to clarify the jurisdiction of the ecosystem mountains, hills, and valleys that determine where the water flows

Solution:

The ecosystem boundary of a drainage basin can be defined by the mountains, hills and valleys that determine where the water flows.

Since the Ecosystem is define as all the organisms and their physical and chemical environment within a specific area where energy and matter influence the distribution and abundance of organisms present.

Thus the right answer is mountains, hills and valleys that determine where the water flows.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

condensation. good luck!