Why did feudalism develop in medieval Europe? Strong kings forced the nobles into this system. The emperor made the system a part of the government. Nobles needed a way to protect themselves and their land. The people in the lower classes needed it as a way to grow.​

a.   it resulted in widespread unemployment.

i think the answer is the one about environmental and social health.

hope this

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.

i believe it would be capitalism