Answer:
a. the biosphere
Explanation:
The biosphere consists of both the living organisms and the non living(abiotic) system which they live in.
There are several factors that may lead to people becoming refugees, including warfare, political instability and natural disasters such as floods, tsunamis and famines. Refugees are defined as people who must leave their homes or native areas for reasons of safety and survival. Natural and man-made disasters can cause large segments of the population to flee from their native states, regions and countries into neighboring territories to wait temporarily until it is safe to move back home, or relocate for good.
Answer:
Relic Border
Explanation:
A physical border is a naturally occurring barrier between two areas
(rivers, mountain ranges, oceans, and deserts)
An antecedent border is a boundary that already existed before the present settlement in that area occurred (the 49th parallel separating the US and Canada)
A relic border is a boundary that has ceased to function but can still be detected on the cultural landscape. <em><u>It no longer exists as an international boundary </u></em>(the Berlin Wall separating East and West Berlin)
A superimposed border is a boundary impose on an area by a conquering or colonizing power that ignores existing cultural landscapes (the division of African countries by the British)
A geometric border is a boundaries drawn based on a grid
system (line of latitude or longitude)
I think the top layer of the earth
