Concept:The "ozone hole" is a metaphorical term for the severe thinning of the ozone layer in the stratosphere, not a literal hole.
Explanation:The ozone layer in the stratosphere protects Earth from harmful UV radiation.
Human-made chemicals like chlorofluorocarbons (CFCs) destroy ozone molecules.
This depletion is most severe over Antarctica and is called the ozone hole.
It does not mean a physical hole in the atmosphere, hydrosphere, or troposphere.
The other options are incorrect: the atmosphere has no literal holes, the hydrosphere is water bodies, and the troposphere is the lowest weather layer.
International agreements like the Montreal Protocol have helped reduce CFCs and slowly heal the ozone layer.
Answer:D. Destruction of ozone layer