The answer would be b) push factors
People here in America are used to more personal space because it is not over populated. But in other countries with crowed houses and overpopulation you would not even be able to walk in your own space.
Sandra is actually looking at the borders of the countries. The correct option among all the options that are given in the question is the first option or option "A". The dark lines separating each of the countries on the map of Europe are actually the borders of the countries in Europe. I hope the answer helps you.
<span>Paleomagnetism is the science of studying the magnetic properties of rocks, sediments, and artifacts which developed in the rocks due to the power and orientation of the earth’s magnetic field while the rocks, sediments and artifacts were being formed. By studying the rocks and sediments scientists can determine when the history of earth’s magnetic field reversed.</span>
