Give reasons.

The snow line is at the sea level in the polar region.

Snowline is the line demarcating between the snow-covered and snow-free areas. It is the line up to which the level of snow extends given a particular point of time. It is the amount of permanent snow. The quantity of snowfall, steepness of the topography, exposure of the area to sun, winds, their speed and velocity are some of the factors that affect the snowline.

The distance of the region from the equator also affects the determination of snow line. It is approximately 4500 m above the sea level at the equator. As one move towards the poles, the snow line at first increases and them falls steadily while approaching the polar region. This is because of the area being constantly covered with snow and with much lesser exposure to the sunlight. This makes the level of snow line near the sea level at the poles.