Which of these is a Canadian snow shelter made from a large pile of loose snow?

A quinzhee or quinzee is a Canadian snow shelter that is made from a large pile of loose snow which is shaped then hollowed. This is in contrast to an igloo, which is built up from blocks of hard snow, and a snow cave, constructed by digging into the snow. The word is of Athabaskan origin, and entered the English language by 1984. A quinzhee can be made for winter camping and survival purposes or for fun.

A similar but more elaborate snow-house is called a lumitalo.

Quinzhees typically have an inside height after excavation which allows for sitting or crouching but not standing.

There are certain differences between a quinzhee and an igloo. The snow for a quinzhee need not be of the same quality as required for an igloo. Quinzhees are not usually meant as a form of permanent shelter, while igloos can be used for seasonal habitation. The construction of a quinzhee is much easier than the construction of an igloo, although the overall result is somewhat less sturdy and more prone to collapsing in harsh weather conditions. Quinzhees are normally constructed in times of necessity, usually as an instrument of survival, so aesthetic and long-term dwelling considerations are normally exchanged for economy of time and materials.