In the early Middle Ages, civilizations in different regions of the world rose and fell. What causes a civilization to become powerful? What causes a civilization to decline? What might happen when a powerful civilization comes into contact with a civilization that is declining?

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.

the correct answer is b, "fertility rates are increasing, so populations will grow more quickly in the future."