Question

1. which innovation helped improve agricultural productivity and allowed people to move to cities?

a. mechanical plow
b. steel mills
c. electric motor
d. irrigation canals

Explanation:

To solve this, we analyze each option:

• Option a: A mechanical plow is an agricultural tool that increases the efficiency of plowing fields, reducing the labor needed for farming. This improved agricultural productivity, freeing up people to move to cities for non - agricultural jobs.
• Option b: Steel mills are related to the production of steel, which is mainly for industrial and construction purposes, not directly for agricultural productivity improvement.
• Option c: Electric motors are used in various industrial and domestic applications, but not directly to enhance agricultural productivity in a way that would free people to move to cities.
• Option d: Irrigation canals help with water supply for agriculture, but they don't have the same impact on reducing the labor needed in agriculture to the extent that a mechanical plow does, and thus don't drive people to move to cities as significantly.

Answer:

a. Mechanical plow