Answer:
The three regions of Oceania are: Melanesia, Micronesia, and Polynesia. Some of the biggest problems Oceana face are: sea level rising , erosion , and water pollution . But the biggest issue they face is climate change here are some effects of that: coastlines can disappear because of water erosion ,some people depend on Coral reefs to make a living and they are being destroyed ,because of the rise of sea levels drinking water is at risk.
Step-by-step explanation:
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