some but if this is a real question that you are doing then say: No most are not but there are some that are but not many. if you get this question wrong than I think that your teacher should go back to collage and take a 1st grade coarse.
Yes, rivers can be man-made through processes such as channelization or dam construction. These human activities reshape natural water flows to create waterways that mimic the functions of rivers.
Some rivers are man made
Canals are man made. Rivers are natural.
No. Rivers are natural features.
rivers,hills,bays and islands
canals are man made waterways, rivers are natural waterways
Rain Rainfall Mountains Volcano Rivers
Something not man-made is typically referred to as natural, such as trees, rivers, mountains, or animals.
No a lot of rivers are man made they can be made to prevent flooding or to get water in certain areas.
All the bridges, wooden walkways and buildings are man made but the volcano itself is not, nor are the geysers, hot springs or rivers for the matter.
There are no rivers in Qatar.
These are generically called "canals".