79-83 題 Coral reefs, often referred to as the "rainforests of the sea," are among the most biodiverse ecosystems on Earth. Though they cover less than one percent of the ocean floor, they provide a vital habitat for a quarter of all marine species. However, currently these vibrant underwater structures are ＿＿（79）＿＿ due to the escalating effects of climate change. The most immediate threat is coral bleaching, a phenomenon that occurs when sea temperatures rise beyond a critical threshold. When water becomes too warm, corals expel the symbiotic algae living in their tissues, which causes them to turn completely white. ＿＿（80）＿＿, the coral is not dead yet, but it is under extreme stress and becomes more susceptible to disease. If the high temperatures persist, the coral will eventually starve to death, leading to the collapse of the entire reef infrastructure. ＿＿（81）＿＿ the loss of biodiversity, the degradation of reefs also has severe economic consequences for coastal communities that rely on them for fishing and tourism. Environmentalists argue that we can no longer afford to ＿＿（82）＿＿ this crisis. Efforts to restore reefs, such as "coral gardening" and the creation of artificial structures, are being implemented worldwide. ＿＿（83）＿＿, these local interventions can only do so much if the global issue of carbon emissions remains unaddressed. Without a concerted international effort to curb global warming, the future of our oceans remains precariously uncertain.