Final answer:
Steam power enabled the development of automobiles, flying machines, threshers, and reapers during the Industrial Revolution.
Step-by-step explanation:
The invention that allowed for products such as automobiles, flying machines, threshers, and reapers was steam power. Steam power played a crucial role during the Industrial Revolution, facilitating the development of new technologies and increasing productivity in various industries. For example, steam power enabled textile mills to produce fabric quickly and at a better price, while agricultural productivity soared with the use of mechanical seeders and threshing machines.