Dendritic because the rivers cross a gradual slope over one basic type of rock.
The Mississippi river is a dedentric drainage
It is Dendritic
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It is Dendritic
The nile is trellis
I would say Trellis because it doesn't look dendritic, but I can't be sure.
The st. Lawrence river is dendritic drainage.
i'm not sure. I think it's a dendritic pattern
both
I don't know about 'treillis' rivers, but the Loire river seems to me to be dendritic (in the sense of arborescent)
trellis as the tributaries meet at approximately right angles
Dendrtitic river system has a tree like pattern (more common) and trellis river system has a rectangular pattern throughout