Concept:Thermal capacity is the property that relates the heat supplied to a body and its resulting temperature change.Explanation:Thermal capacity is defined as the amount of heat required to raise the temperature of an entire body by 1K.Mathematically, C=ΔTQ.When ΔT=1K, the heat required Q equals the thermal capacity C.Specific heat is the heat required per unit mass, while water equivalent is the mass of water with the same heat capacity.Therefore, the body's heat capacity or thermal capacity matches the description.Answer:B. Thermal capacity