Answer:evolutionary psychology
Explanation:
Evolutionary psychology focuses o those behaviors that are due to the traits that we inherited from our ancestors, one's territory was very crucial to protect by all means and this was a survival instinct from our ancestors. If they didn't protect their territory that means they would lose everything that they have built so this issue of not wanting to reverse out if someone is coming in your previous parking spot is an instinctive way of protecting one's own territory.
I believe the answer is: They are based on the arbitrary borders of old European empires
African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.
Trade enhances economies through the creation of jobs, and the sale of the items. Can't have an economy without buying and selling. Trading is usually a positive thing, that being said certain types of trade can actually hurt jobs. For instance, when more modern clothing was invented and sold, lots of people selling animal skin clothing and such probably had to find a new way to make a living.
Plasma is a state of matter.
