Resistivity is a property of a material. It is not dependant on the dimensions. Resistance is.

If you were making a resistor out of a single piece of wire, yes you would. The question was asked in the context of a cable so yes.

As for component resistors, they are made of different materials, or they are long pieces of wire wrapped up into a more convenient package, ie the manufacturer has done that dimensional work for you.

However, I will give you one more chance.

Is this different to resistivity and if so, how?