Final answer:
The explosive growth during the Progressive Era was fueled by industrialization and advancements in technology and inventions.
Step-by-step explanation:
The explosive growth during the Progressive Era was fueled by industrialization. This period saw significant advancements in the manufacturing and production of goods, leading to the rise of factories and the expansion of the economy. Industrialization brought about a wave of urbanization as people moved to cities for employment opportunities. Additionally, the development of new technologies and inventions during this era contributed to the overall growth and progress.