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").

[EX Q]: Fact1: Coral reefs provide food and shelter to many ocean organisms., Fact2: Coral reefs occur mainly as numerous patch reefs., Question: Where is the name of a habitat where a variety of ocean organisms often seek food and shelter? (A) gastropod shells (B) body water (C) seaweed (D) more abundant (E) whale (F) coastlines (G) algae (H) patch reefs
[EX A]: H

[EX Q]: Fact1: chemical weathering causes iron in rock to oxidize, Fact2: Oxides Oxides Oxides are elements combined with oxygen., Question: Chemical weathering causes iron in rock to combine with what? (A) uranium (B) oxygen (C) cartilage (D) nothing (E) an object (F) vacuum (G) energy (H) heat
[EX A]: B

[EX Q]: Fact1: thick fur can be used for keeping warm, Fact2: Becuse of that, the fat layer was needed to keep warm, now that the fur coat was removed., Question: What do animals without thick fur need to stay warm? (A) colder weather (B) less fat (C) In the winter (D) hard outer covering (E) layers of fat (F) thinner fur (G) nutrients (H) hydrogen and oxygen
[EX A]:
E