Answer:
a. the amount of biologically productive land/sea area needed to support the lifestyle of humans
It is mainly wheat and corn.
Northeastern United States is the region next to the Great Lakes (for example: lake Ontario) - and in fact they form the border between the Northeastern United States and Canada. (Perhaps" Great Lake region" fits better the gap - the gap needs a phrase in singular form).
A. Much of the interior of Southwest Asia is desert.
Altitude because the higher up the colder the temp. And the higher up the less oxygen so the altitude would be a temp changer between fort William and Plymouth
