ANSWER:
The Ohio river is a river that flows in the mid-western United States.
Step-by-step explanation:
- The rivers flow north-west out of Pennsylvania and then in a south western direction.
- The Ohio is the "second largest river" in US in term of discharge of water.
- The river flows along the "border of six states" of US. The largest tributary of Ohio is the Tennessee.
- The Ohio river is a source of 'drinking water' for more than 'three million people' in US. It also forms a drainage basin.