Which best describes oceania?
a region composed mostly of islands
a region with little cultural variation
a region that has only a few large countries
a region that lies in the northern hemisphere

The correct answer is - A region composed mostly of islands.

Oceania is a region that is located in the Pacific Ocean. It is consisted of 14 island countries, and multiple other countries that are not fully independent and function as protectorats mainly of the USA and France. It is a vast region consisted of tens of thousands of islands, most of which are very small. The countries in this part of the world are very isolated and are mostly dependant on tourism and foreign aid to enable their existence. Also there's a new problem in the past few decades with the increasing level of the ocean waters, so some of the island countries, like Nauru for example, are losing their territory to the ocean, so it is very likely that in few decades will be totally submerged and not stop existing.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.