Explanation

Resistivity measures how strongly a material opposes current: silver, the best conductor, has ρ ≈ 1.6×10⁻⁸ Ω·m. Nichrome, the alloy used in heating elements, has ρ ≈ 1.1×10⁻⁶ Ω·m — about 70 times that of silver. Glass is an insulator with ρ ≈ 10¹⁰–10¹⁴ Ω·m. The correct increasing sequence is therefore Silver < Nichrome < Glass.