Who would best match the category of greenland? leif ericson eric the red

I suppose the answer depends on what is meant by "best matches."  Erik the Red founded the Norse settlement in Greenland.  Leif Erikson grew up in Greenland and set out from their to pursue further explorations.

Erik Thorvaldsson, known as Erik the Red, lived around 1000 AD.  He is  famous in Norse history as founder of the first Norse settlement in Greenland.  According to Icelandic sagas, he was born in Norway before his travels.  He is known as "Erik the Red" likely because of the color of his hair and beard.  

Leif Erikson was the son of Erik the Red. He led the first European expedition to the North American continent, before Columbus "discovered" the "New World" here.  The Norse expedition led by Leif Erikson landed in the region we know as Newfoundland in modern Canada.

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation:

because of the war the westeners befriended japan and each other advance.