Most of the australia and oceania region has a population density of people per square kilometer. most of the australia and oceania region has a population density of people per square kilometer. 6 6-25 26-100 101-250 251-500

Population of 42,128,03, density of 4.96 and growth rate of 1.34%.

Explanation:

The predominant religion in Oceania is Christianity, 92 % magnesia and 93%  Micronesia. And belong to the native Austronesian family. Largest developed nations being Australian and  New Zealand. Oceania ranks 6th amongst the world in terms of population.67.7 % of the population is urban. Due to the island are separated by the oceans they posse great biodiversity.  Spread across various islands in the pacific ocean and all have live tectonic and volcanic activity. Most of the people inhabited the island are non-natives. About 780 distinct languages are being spoken.

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).

I'm pretty sure it's c. extremely gradual but not 100% sure though.