Which of the following best describes a drumlin?

A drumlin is best described as a long, narrow mound of till, which is a type of sediment that is formed by glacial activity. Drumlins are typically oval-shaped, and they are composed of glacial deposits that have been streamlined by the movement of ice sheets. The shape and orientation of drumlins indicate the direction of the glacier's flow. This makes them important geological features for understanding past glacial movements and the dynamics of ice sheets.

The characteristics of drumlins illustrate their unique formation process, where the glacier reworks and deposits materials, creating the characteristic tapered shape, often found in clusters. Understanding drumlins helps in the study of glacial geomorphology and paleoenvironments, contributing valuable insights into both the processes of glaciation and the landforms that result from them.