The lower levels of the pyramid must also grow-for more people to consumer higher-end items, there must be more people to make those items.
Answer:
formal region is an area inhabited by people who have one or more characteristics in common. ... Examples of formal regions are Europe, Africa, United States, and Canada. Functional Region. A functional region is an area organized to function politically, socially, and economically as a single unit.
Economic geog.
political geog.
demography
social geog.
war geog.
agriculture geog.
settlement geog.
regional geog.
All 3 sciences, geology, criminology and psychology in human geography, oceanography (if thats a thing), vulcanology