Which of the following landforms are formed as a result of glacial deposition?

Glacial deposition occurs when glaciers lose their energy and sediment they've carried becomes deposited. This process leads to various landforms, primarily those formed from the accumulation of ice, soil, and rocks. Moraines are one of the most noticeable features; they are accumulations of debris that form along the edges of glaciers, marking the furthest advance of the ice. Till plains, on the other hand, are flat areas formed by the deposition of materials carried along by a glacier and released as it melts.

The other options present landforms that do not originate from glacial activity. For instance, plateaus and valleys are typically shaped by erosion rather than deposition, and mountains and cliffs usually form through tectonic activities and erosion rather than direct depositional processes related to glaciers. Sand dunes and deltas are primarily associated with aeolian (wind) or fluvial (water) processes, respectively, rather than glacial activity. Therefore, the identification of moraines and till plains as landforms formed by glacial deposition is accurate and highlights the significant impact glaciers have had on shaping the landscape.