Which energy source was most important during the early stages of interest structure and i which energy source was most important during the early stages of industrialization

The defining invention of the Industrial Revolution was most definitely the steam engine. The steam engine was the energy behind the most advanced textile inventions, such as the spinning mule and the power loom. It symbolized the transition from human power in homes to machine power in factories. Moreover, the steam engine revolutionized transportation when it was applied to locomotives and ships.

i would go with the last one