A trellis drainage pattern forms when tributaries join the main river at right angles. It forms in a ridge-and-valley landscape,where rocks that have unequal resistance to erosion are folded into series of anticlines and syclines.
The rivers bandon, lee and blackwater have trellis pattern. These developed when the softer limestone that occupied the anticlineswas eroded, leaving the more resistant sandstone anticlines standing out.
The rivers that occupy many glaciated valleys, including the gap of dunloe, also have trellis pattern.
Dendritic drainage patterns are tree like while trellis drainage patterns are formed when tributaries meet at right angles so they look like squares or rectangles.
Narmada River
The Amazon River is an example of dendritic drainage, which resembles the branching pattern of tree roots. Dendritic drainage patterns are common in areas with uniform rock structure and slope, where rivers and streams flow in multiple directions.
The four major drainage patterns are dendritic, radial, rectangular and trellis. The factors that influence them are soil type, climate and the human interventions.
The nile is trellis
both
I would say Trellis because it doesn't look dendritic, but I can't be sure.
The factors responsible for the formation of various drainage patterns include the underlying geology, slope of the land, climate, and human activities. These factors determine how water flows across the landscape, leading to the development of dendritic, radial, rectangular, trellis, or parallel drainage patterns.
The amazon river is probably a trellis because it has 2 types of alternating soft and hard rocks. A trellis drainage is the rectangular drainage pattern created if rivers flow through alternating bands of hard and soft rocks.
Trellis
trellis as the tributaries meet at approximately right angles
Narmada river