The "Animal Energy Equation" for Endotherms States That E_input-E_loss= E_BMR+E_production+E_activity+E_DIT

The "animal energy equation" for endotherms states that E_input-E_loss= E_BMR+E_production+E_activity+E_DIT.
In this equation, E_loss refers to

A) thermal energy given off as a consequence of the first law of thermodynamics.
B) thermal energy given off as a consequence of the second law of thermodynamics.
C) thermal energy given off as a consequence of dietary intake.
D) potential energy given off in the form of undigested foodstuffs (feces) , sloughed skin, hair or other body products.
E) none of these.