What happened when the wheel was invented?

The first wheels were not used for transportation.

Evidence indicates they were created to serve as potter's wheels around 3500 B.C. in Mesopotamia—300 years before someone figured out to use them for chariots.

The wheel was invented in the 4th century BC in Lower Mesopotamia(modern-​​day Iraq), where the Sumerian people inserted rotating axles into solid discs of wood. It was only in 2000 BC that the discs began to be hollowed out to make a lighter wheel. This innovation led to major advances in two main areas.

After the invention of wheel the transport of goods became easy and affordable. ... But after invention of wheel the goods were carried easily from one place to another. Further the improvement lead to development the wheel i.e. wheels were made from rubbers.

The wheel was an extremely important technological development, almost as significant as the ability to control and use fire. Civilizations that made use of the wheel had a greater ability to produce food, manufacture goods, and transport goods and people than those that did not.

THE WHEEL is often described as the most important invention of all time – it had a fundamental impact on transport and later on agriculture and industry. ... Soon, it became common for the wheels to turn around a fixed axle. Wheels with spokes, first made around 2000 BC, were lighter, enabling vehicles to move faster.

B. a circuit. i think