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: Temperature falls from lower to higher altitudes., Fact2: If the weather is warm, their temperature rises., Question: What falls from lower to higher altitudes? (A) warm weather (B) sun's heat (C) rainfall (D) heat energy (E) kinetic energy (F) water vapor (G) colder and wetter (H) Greenhouse gasses

A: A
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Q: Fact1: Skin color is another polygenic trait., Fact2: Most dental variations are polygenic, that is controlled by several genes., Question: Skin color is a trait controlled by what? (A) prokaryotic cells (B) one gene (C) enzymes (D) keratin (E) one's descendants (F) several genes (G) the environment (H) a single gene

A: F
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Q: Fact1: melting is when solids are heated above their melting point, Fact2: When melted or dissolved in water, the crystal lattice is destroyed and the ions move freely., Question: What is when solids are heated and ions move freely? (A) dissolving (B) refreshing (C) kinetic energy (D) removing (E) boiling (F) barrel-shaped (G) renewing (H) unidirectional

A:
A
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