Concept:GLOF is an acronym for a type of flood caused by the sudden release of water from a glacial lake.
Explanation:GLOF stands for Glacial Lake Outburst Flood.
Here, "O" stands for Outburst.
An outburst means a sudden and violent release of water.
This happens when the natural dam holding a glacial lake breaks.
The dam can be made of ice or loose earth materials.
Once the dam fails, a large volume of water rushes downstream rapidly.
This can cause severe flooding and destruction with very little warning.
Climate change is increasing the frequency of such events.
Answer:The correct option is D. Outburst.