Answer:
The answer is written language
Manioc is native to tropical south America, where it was grown, processed, and used by many different groups to make bread and porridge. it spread to the Caribbean and other tropical parts of American during pre-Colombian times and was encounter by the columbus on his first voyage to the new world.
Papua New Guinea is located on the island of New Guinea (which is shares with Indonesia). The whole island is located North of Australia, which means that Australia is located South of both the island and the country located on it - so the entire statement is true.