The discovery of a large deposit off a nations shores would be what type of economic variable

positive external shocks

Explanation:

This is evident in the fact that "positive external shocks" is a term that is used to describe unexpected factors such as the discovery of gold, oil, or the sudden invention of a scientific product that can apparently enhance the financial gain of a country.

Hence, in this case, the correct answer is "positive external shocks."

e. all of em

~courtney

answer; /// i do believe that the correct answer is (a); a farming tribe that settled primarily along the mississippi and arkansas rivers;