The former international border between East Germany and West Germany is best described as
a. an open border
b. a demilitarized zone
c. a relict boundary
d. an antecedent boundary
e. a geometric boundary

d. an antecedent boundary

Explanation:

An antecedent boundary is defined as a political boundary that is created before settlement and existed till the settlement.

The international border between East Germany and West Germany is known as Berlin wall, which is an antecedent boundary that was created to stop the  large-scale emigration of people from East German to the West after get  defeated in World War II.

Hence, the correct answer is "d. an antecedent boundary".

an economic of depression

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.