Concept:Drainage patterns show how a river and its tributaries are arranged in a region.
Trellis is one such pattern.
Explanation:A delta is a landform formed at a river's mouth.
The mouth is where a river enters a sea or lake.
The source is where a river begins.
These are river features, not drainage patterns.
A trellis drainage pattern develops where alternating bands of hard and soft rocks exist.
In this pattern, tributaries join the main river at nearly right angles.
Therefore, among the given options, only trellis is a drainage pattern.
Answer:D. Trellis