Answer:
If sea level vary just as a function the doesn't depend on the regional erosion/ uplift then the sea level changes are determined just as a module of 10 is multiplyed by 100, 1000, 10 000 for the next 1000, 1000000, 10 000000 years
If not then we have to have the coordinates of the interconnected variations
Answer: Economists view the term Economic stability as a state of constant economic growth along with low inflation.
Explanation: When economy of any country is growing positively it ultimately reduces the inflation in a country. Thus we can say that they are inversely proportional to each other, means when you see increasing inflation, it indicates that the economic growth is either negative or stagnated however, when inflation is decreasing it indicates that the economy of a country is growing positively.
Measure tectonic plate movement below the earths crust and the waves
GDP, which we use right now, to see how many people have jobs, at what income, to decide how good the economy is. We could possibly use population density, as poorer countries/less developed countries tend to be more dense all around. Mainly economic things though, so GDP, income per capita. We use life expectancy, rate of literacy, freedom index..hope this helps