Final answer:
Large farms replaced small farms in the 1700s due to advancements in agricultural technology, enabling larger farms to increase efficiency and productivity.
Step-by-step explanation:
In the 1700s, large farms replaced small farms primarily due to advancements in agricultural technology. The Industrial Revolution brought about improved farm equipment and technology such as tractors, seed drills, threshers, and combine harvesters. These new tools enabled larger farms to increase efficiency and productivity, leading to their dominance over smaller farms.
With the introduction of new technology, farmers were able to plant large fields of a single crop to maximize profits. Additionally, improved transportation and refrigeration made it possible to safely ship produce all over the world, expanding market opportunities for large farms.