Resistivity at a given temperature depends upon?

Area of cross section

Length

Nature of material of conductor

Both length and area

Resistivity (ρ) is a material property — it depends only on the type of material and its temperature.
It does not depend on the length or cross-sectional area of the conductor.

$R = ρ \cdot L/A$

Here, $R$ is resistance, $L$ is length, $A$ is area, and $rho$ is resistivity.
Length and area affect resistance, not resistivity.