The gently sloping accumulation of coarse alluvium deposits by a braided stream is known as

The correct answer is Option 1: sand bar.

In the context of fluvial geomorphology, a braided stream consists of a network of river channels separated by small, temporary islands called sand bars (or braid bars). These bars are formed by the gently sloping accumulation of coarse alluvium (sand and gravel) when the stream's sediment load exceeds its carrying capacity, typically in areas with low gradients and high sediment supply.

• Why Option 1 is correct: Sand bars are the defining depositional feature within a braided channel, formed directly by the deposition of bedload.
• Alluvial fans (Option 2): These are cone-shaped structures formed where a stream leaves a mountain range and enters a plain; they are not specific to the internal structure of braided streams.
• Bajadas (Option 3): These represent a continuous apron of sediment formed by the merging of multiple alluvial fans.
• Diaras (Option 4): This term refers to flood-prone riparian land or islands, often used in regional Indian contexts, but "sand bar" is the standard geomorphological term for the described feature.