Question

fast-moving glaciers that can move up to 6 kilometers per year.

Answer 1

is the first woman Glacier that can move up to 6 km per hour it is correct answer .

Answer 2

The flow of the glacier is caused by the force of gravity which makes it move downhill and therefore spreads it out.

Sometimes due to this process cracks get formed since the ice spreads faster outside than on the inside after the gravity pulls it in hence creating crevases in the glacier.