Answer: A "The Decrease in trade among societies
Explanation:
As cities grow, s does their impact on other societies. In order to grow more, cities need to trade materials they have abundance in for materials they don't
Plate tectonics are important to geoloigists because they explain how the continents make up the earths crust.
<span>One of three methods that could be used to plan a population is making a law where childbirth is limited in number. Another method is to encourage the adoption or fostering of children with no parents. A third method of planning a population is to limit who in the population can reproduce.</span>
