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").
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Question: Fact1: a compass is used to navigate oceans, Fact2: And to the east is the Atlantic Ocean., Question: what is a compass used to navigate? (A) density (B) lamphreys (C) marine (D) outer space (E) their speed (F) Antarctica (G) non-magnetic planets (H) the Atlantic

Answer: H

Question: Fact1: a glacier causes mechanical weathering, Fact2: Largest of the glacier-formed lakes is Karakul., Question: What can be formed by mechanical weathering? (A) NaCl (B) white (C) rock (D) tube (E) soils (F) Roads (G) Lakes (H) sand

Answer: G

Question: Fact1: a flashlight converts chemical energy into light energy, Fact2: Light is electromagnetic energy in the form of waves., Question: What emits light waves? (A) an object (B) a radio (C) sensory neurons (D) solid, liquid, gas (E) a chair (F) a flashlight (G) harmful substances (H) a rock

Answer:
F