Respuesta :
The gradient smooth ens...the waterfalls and the rapids gradually disappears
Answer: It has low gradient and low erosive energy
Explanation:
A river can be defined as the natural flow of water course, which is usually a source of water. This water flows towards the another river, ocean or sea.
A older river usually has very low gradient and low erosive energy. They also have flood plains.
Example of older rivers are : Yellow, Nile, lower Ganges, et cetera.
