Which one of Cu, Fe and Ag offers great resistance to the flow of electric current?

Explanation

To determine which of the metals Cu (copper), Fe (iron), and Ag (silver) offers the greatest resistance to the flow of electric current, we can follow these steps:

### Step 1: Understand Resistance
Resistance (R) is the opposition that a material offers to the flow of electric current. It is influenced by the material's resistivity (ρ), length (L), and cross-sectional area (A) as given by the formula:
\[ R = \frac{\rho L}{A} \]
For our comparison, we will focus on the resistivity (ρ) of each metal since the length and area are constant for this comparison.

### Step 2: Gather Resistivity Values
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