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").

Q: Fact1: webbed feet are used for moving faster through water by aquatic animals, Fact2: Animals move around, seeking their prey., Question: What do webbed feet help aquatic animals do? (A) rapid expansion (B) root growth (C) Catch prey (D) support (E) Regrows it (F) squeeze (G) Relieve pain (H) improve

A: C
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Q: Fact1: soil is formed by rocks eroding, Fact2: Rivers erode the rocks they flow over., Question: What is formed by rivers? (A) fish (B) soil (C) rain (D) bamboo (E) spring (F) clouds (G) kayaks (H) NaCl

A: B
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Q: Fact1: blowing air into a whistle causes air to vibrate inside the whistle, Fact2: Sounds are vibrations in air., Question: What creates sounds? (A) energy of moving objects (B) chemical messengers (C) the body's largest organ (D) peace (E) Thinking hard (F) Blowing a whistle (G) Electrical energy (H) death

A:
F
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