The answers are E and F.

Abstemious: This term refers to someone who refrains from excessive indulgence, especially in food and drink. It contrasts with the expected behavior of a competitive eater, known for consuming large amounts of food, by suggesting a surprising lack of indulgence or moderation in eating habits.

Ascetic: An ascetic person leads a simple life with self-discipline and often denies themselves of pleasures or indulgences. In the context of the sentence, it highlights the unexpected contrast between the champion competitive eater's behavior, known for excessive eating, and the implied restraint or self-denial suggested by the word "ascetic."

Both "abstemious" and "ascetic" contrast with the typical behavior associated with a champion competitive eater, as they imply restraint, moderation, or self-discipline in eating habits, which is unexpected in such a context.