The impacts of a global temperature rise exceeding 3°C above pre-industrial levels are profound and multifaceted. Firstly, a warming trend of this magnitude is likely to shift terrestrial ecosystems, leading to a net carbon release from the biosphere due to altered vegetation patterns and increased respiration rates, significantly contributing to further climate change. Secondly, widespread coral mortality is anticipated because corals are highly sensitive to temperature changes, with higher temperatures causing bleaching and mortality in coral reefs, which are crucial for marine biodiversity. Thus, options 1 and 2 reflect realistic and scientifically supported consequences of extreme global warming, aligning with concepts discussed in UPSC-level environmental studies.