Answer: A drainage pattern in which tributaries join at high angles, often approaching right angles, which is common in areas with rocks of different strengths (thus resistance to erosion) and in areas with regular series of folds (anticlines and synclines).
Explanation: A trellis drainage pattern is characterized by a series of parallel main streams that are connected by short tributaries which flow into them at right angles, resembling a garden trellis. This pattern is commonly found in areas with folded topography, where the underlying rock strata consists of alternating bands of resistant and less resistant rock. The streams tend to follow the bands of less resistant rock, while the tributaries follow the bands of more resistant rock. The trellis pattern is efficient in draining water from the landscape and is commonly found in regions with moderate to high rainfall.
