Why do the arctic and the antarctic experience extremely cold climates? because these regions receive cooling winds throughout the year because these regions are filled with flat grasslands because these regions receive heavy rainfall throughout the year because these regions are at a great distance from the equator

Because of the distance to the equator

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor:

Largely uneconomic because they provide little profit or food surplusi think so