What happens to current flow with thicker wires?

Thicker wires have a larger cross-sectional area, which allows for more space for electrons to move through the conductor. This results in decreased resistance according to Ohm's Law, which states that the flow of electric current is inversely proportional to resistance. When the resistance is lower, for a given voltage, the current can flow more freely, leading to an increase in current flow.

Additionally, thicker wires can also carry greater amounts of electrical power, thereby enhancing their ability to support higher currents without overheating. This property is particularly important in electrical applications, where wiring must be adequate to handle the required electrical load safely.

In contrast to other options, the thicker wire does not lead to decreased current flow, nor does it leave the current unchanged or eliminate it altogether. Instead, it effectively facilitates an increase in current flow due to its reduced resistance.