Question

The landform shown in the following picture can be found on every continent; they are even found in Africa.



What conditions are necessary for this landform to form?

Responses

It must be below freezing and very dry.
It must be below freezing and very dry.

It must be cold, and more snow must fall than melts.
It must be cold, and more snow must fall than melts.

It must be mild, and there must be lots of precipitation.
It must be mild, and there must be lots of precipitation.

It must be below freezing, and more snow must melt than falls.
It must be below freezing, and more snow must melt than falls.
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Answer 1

"It must be cold, and more snow must fall than melts."

Glaciers form where snowfall accumulates over time and compacts into ice — i.e., accumulation exceeds ablation (melting and sublimation). Temperatures need to be low enough that snow survives the summers (not necessarily below freezing year‑round), and sustained net snow input is required.