The sentence that uses the word "voracious" correctly according to the dictionary definition provided is:
D: The minotaur had a voracious appetite and regularly devoured sixteen Athenian youth each year.
This sentence correctly uses "voracious" to describe a large appetite for food. The other sentences either apply "voracious" in contexts that don't relate to appetite (A, B, and C), or in a way that strains the definition (B and C).