Answer:
(From the least to the greatest) Glass < Iron < Water
Explanation:
The greater the specific heat of the material, the greater the amount of heat needed to increase temperature. Specific heats of each material are presented below:
Iron (Rank 2)
[tex]450\,\frac{J}{kg\cdot K}[/tex]
Glass (Rank 1)
[tex]0.8\,\frac{J}{kg\cdot K}[/tex]
Water (Rank 3)
[tex]4186\,\frac{J}{kg\cdot K}[/tex]