Answer:
The presence of many sedimentary rocks with fossils acts as evidence to prove the existence of a flowing river in the region.
Step-by-step explanation:
- Rivers carry a lot of debris along with them. These include rocks, sand and fossil remains of the organic matter that got mixed with the river water in some or the other way.
- In its usual course, the river carries and dumps these rocks and fossils every now and then. Thus the presence of sedimentary rocks and fossils in a region is partially evident of the existence of a river in the region.