Final answer:
The subject of this question is Chemical and physical characteristics. This subject deals with the various properties and characteristics of different substances, including their physical appearance, behavior, and how they interact with other substances. The correct option is c.
Step-by-step explanation:
Based on the information provided, the substance that is described as a hard, shiny solid that melts at a specific temperature, does not conduct electricity as a solid, and is insoluble in water can be categorized under Chemical and physical characteristics.
This subject deals with the various properties and characteristics of different substances, including their physical appearance, behavior, and how they interact with other substances. Hence, c is the correct option.