Tại sao phải phân bố dân cư hợp lý

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary. 

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.

C. rainforests have recently grown into nearby biomes