The ohmmeter measures its resistance. On the right we have a shorter wire made of the same material. It has less resistance. Electricity goes through it more easily because it is shorter. The resistivity of the material the wire is made of is the same in both cases.
Metals have fairly low resistivity and allow electricity to flow easily.
That's why electrical wire is made of metal, usually copper. Rubber, glass, air, and most kinds of rock have high resistivity. Materials with low resistivity are called conductors . Those with high resistivity are insulators . More formally, resistivity is defined as the resistance of a 1 meter path through a cubic meter of a substance.