Answer:
The amount of heat required to change the temperature of 1 g of any substance by one °C is defined as:
a. the specific heat of that substance
Explanation:
Specific heat (often denoted by the symbol "c") is a physical property of a substance that measures the amount of heat energy required to raise the temperature of a unit mass (usually 1 gram) of the substance by one degree Celsius (or one Kelvin).