Which term describes land that has been created by the process of accretion?

The correct term to describe land that has been created by the process of accretion is indeed alluvion. Accretion refers to the gradual accumulation of sediment or soil that builds up along riverbanks or shorelines, leading to an expansion of land. Alluvion specifically denotes the additional land that has formed due to this natural process of sediment deposition.

In contrast, littoral land refers to land that is located along the shore of a lake, sea, or ocean, but it does not inherently describe new land formed through accretion. Dry land generally refers to any land that is not submerged underwater, but this term lacks the specific connection to the geological process involved in land expansion. Surface land is a broad term that encompasses land at ground level but does not accurately capture the unique process of land formation through accretion. Thus, alluvion is the precise term that appropriately identifies land created by accretion.