A) how do roche moutonnees and drumlins form? b) can you tell the direction of ice flow from these features?

Explanation:

Roche moutonnees  -

It is a rock formation created by passing of a glacier .when glacier ice pass over the underlying bed rock then often asymmetric erosion form on the stoss (which is in upstream direction ) side of the rock and pluncking on the lee (which is in the downstream direction ) side . This erosion feature is called Roche mountonnees .

Drumlin :

It is an elongated or oval hill, which is formed via the streamlined movement of the glacial ice sheets across the  rock debris . It is generally found in lowland region with their long axes roughly parallel to path of glacial flow .

The side of glacier is always steep and high , while the lee side is tapered and smooth gently in the direction of ice movement.