D.the testing of nuclear weapons by north korea. because they have more weapons that could destroy many places
I can give you one:
One of the theories (in which i mostly believe in) is the one when every period of time, the climate changes. Now, we are in the warmth period, but after this period, there will be a cooler climate, and keeps repeating every while (think about the ice age)
Answer:
Because it sits on boundary.
Explanation:
