Final answer:
Differences between a drumlin and a roche montonnée include erosion and deposition, with the former shaped by deposited till and the latter by glacial erosion on one side and deposition on the other.
Step-by-step explanation:
The differences between a drumlin and a roche montonnée pertain primarily to two aspects: Erosion and deposition. A drumlin is formed by the smoothing and deposition of glacial till, which builds a streamlined hill with a tapered end facing downstream with respect to the former glacial movement. The roche montonnée, on the other hand, is created by glacial erosion on the up-glacier side and deposition on the down-glacier side. It is typically asymmetrical, with a gentle slope facing the direction from which the ice came (stoss side) and a steeper, often more jagged side facing the direction the ice moved towards (lee side).