Which of the following phrases best describes Oceania's physical geography?

a. extremely cold and dry

b. easily accessible by automobile

c. too dangerous to be inhabited

d. isolated from the rest of the world

Too dangerous to be inhibited is the phrase among the phrases in the question, best describes Oceania's physical geography. The correct option among all the options that are given in the question is the third option or option "c". This region has developed in an isolated manner and so is home to a variety of dangerous animals and plants.

The best way to describe Oceania's physical geography is that Oceania is isolated from the rest of the world.