Explanation:

Let’s break it down:

- Conductivity tells you how well a material lets electricity flow.

- The reciprocal of conductivity is resistivity. Basically, if resistivity is high, conductivity is low, and vice versa. Option 3: Resistivity is the correct answer.

- Resistance isn't the same; it's about how much an object opposes electric flow, but its reciprocal is conductance, not conductivity.

- Current is just the flow of electric charge. No “reciprocal” relationship to conductivity.

- Voltage is the push behind the current. Again, not the opposite of conductivity.