Explanation:

Canyon:
A canyon is an erosional landform that is created by the continuous action of flowing water over a long period of time. The process of erosion by water, wind, or ice gradually wears away the rock, creating a deep and narrow valley with steep sides. Canyons are typically found in arid or semi-arid regions where there is little vegetation to stabilize the soil.

Delta:
A delta is a depositional landform that is formed at the mouth of a river where the river meets a body of water, such as a lake or an ocean. The river carries sediment downstream and deposits it at the mouth, creating a fan-shaped landform. Deltas are not erosional landforms but rather depositional landforms.

Plateau:
A plateau is a flat-topped landform that is typically formed by the uplift of the Earth's crust or by the erosion of surrounding areas, leaving a raised, flat surface. Plateaus are not erosional landforms but rather tectonic or depositional landforms.

Volcano:
A volcano is a landform that is created by the eruption of molten rock, ash, and gases from beneath the Earth's surface. Volcanoes are not erosional landforms but rather volcanic landforms that are created by the deposition of volcanic materials.
Therefore, the correct answer to the question is option B) Canyon, as canyons are erosional landforms formed by the continuous action of flowing water.