Answer:

a) conductivity

Explanation:

• Assuming the wire obeys Ohm’s Law, for a given voltage, in order to have a larger current, the resistance must be lower.
• The resistance of a resistive element is given by the following equation:

        [tex]R = \rho * \frac{L}{A}[/tex]

• If geometric parameters keep the same, the only choice to lower the resistance value is diminishing the resistivity ρ.
• The resistivity, indeed, is defined as the inverse of the conductivity, σ.
• So, if resistivity decreases, conductivity increases.
• So, in order to have a larger current, all other things being equal, the wire must have a larger value of conductivity.
• The option a) is the right one.