Final answer:
Agricultural innovations, technological advancements, and the growth of cities were the main factors that spurred industrial growth in the late 1800s.
Step-by-step explanation:
The factors that spurred industrial growth in the late 1800s were agricultural innovations, technological advancements, and the growth of cities. Industrialization shifted the focus from manual labor to machines, which increased productivity and efficiency. Innovations such as the steam engine and mechanized tools revolutionized industries like textiles and transportation. Additionally, the growth of cities allowed for a larger labor force and the concentration of factories, leading to further industrial growth.