In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: preventing the transfer of heat from an organims 's body causes that organism to keep warm, Fact2: Fur and feathers help keep some animals warm during the harsh winter., Question: What function can fur and feathers perform for some animals? (A) the support structure (B) they travel great distances (C) the process of adaptation (D) structure and function (E) temperature regulation (F) prevent bodies from transferring heat (G) heat to cooler objects (H) the production of heat
F