If voltage is held constant, what factor could lead to an increase in current?

The selection of a decrease in resistance as the correct answer is rooted in Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). Mathematically, this relationship is expressed as I = V/R. When the voltage is held constant, any reduction in the resistance will directly result in an increase in current.

For example, if the resistance in a circuit decreases due to a change in components or the introduction of a parallel pathway, while the voltage remains the same, the overall flow of current through the circuit will increase. This principle is fundamentally important in electrical engineering and circuit design as it demonstrates how resistance influences current flow.

The other factors mentioned do not apply here as they either change voltage directly or do not have a direct effect on current in the context of the question. An increase in load typically indicates a higher demand for power but does not inherently change the current flow unless it affects voltage and resistance. A displacement of the circuit configuration might introduce variations in how components are arranged, but without directly altering resistance, voltage, or current, it is not the determining factor in this scenario.