As Animals Take in Food Energy,approximately 10% of It Is

As animals take in food energy,approximately 10% of it is made available to the next level in the food chain.Which of the following is one of the ways in which the energy is used by the organism and not passed along?

A) cellular respiration
B) defecation
C) excretion
D) death
E) All of these are ways in which the organism uses the energy.