Land-system change (Option B) has been breached due to deforestation, agriculture expansion, and urbanization, which have led to:
Loss of biodiversity.
Disruption of ecosystems and carbon sequestration processes.
Option A (Ocean acidification) is a major concern but is approaching, not yet fully breaching, planetary boundaries.
Option C (Stratospheric ozone depletion) has improved due to international regulations like the Montreal Protocol.
[References:, Stockholm Resilience Centre: Planetary Boundaries Report (2023), IPCC Special Report on Climate and Biodiversity, UNEP Ozone Layer Recovery Updates, , , , , ]
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