Answer:
Machines
Explanation:
Machines became widely used in farming, and consequently, farms required fewer workers. Large, technologically advanced farms replaced subsistence farms. The Industrial Revolution demonstrates an idea known as economies of scale. According to this principle, increased production of goods leads to increased efficiency.
Answer:
A. The Tiber River
Explanation:
The Tiber provided a source of fresh water to Romans and was also an important route for trade and transportation.