Triangular-shaped land formed by slit deposits at the mouth of the river. Canyon, dune, isthums, plateau, savanna, delta tributary, oasis, reef, and strait

Answer 1

Delta.

A delta is a triangular-shaped landform formed by the deposition of sediment carried by a river as it flows into a larger body of water, such as an ocean or lake. Deltas typically have a network of distributaries that branch out and carry sediments to different areas, creating fertile soil that supports diverse ecosystems. Deltas are important habitats for various plant and animal species, and they also provide important economic resources for human populations through agriculture, fishing, and other activities.