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: a greenhouse is used to protect plants by keeping them warm, Fact2: Flower size varies by plant., Question: How does a greenhouse protect flowers? (A) keeps them away from the sun (B) keeps them warm (C) keeps them out of soil (D) an external framework (E) it needs them (F) keeps them cold (G) rays or beams (H) by indirect light

A: B
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Q: Fact1: rocks interacting with wind over long periods of time causes weathering, Fact2: On Earth, rocks are weathered by wind and water, creating soil and sand., Question: What causes rocks to weather? (A) seasons (B) force (C) erosion (D) storms (E) water (F) heat (G) lightning (H) gas

A: E
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Q: Fact1: clouds are formed by water vapor rising into colder regions of the atmosphere and condensing, Fact2: Water is made up of H2O molecules., Question: what vapor forms clouds by rising into the atmosphere condensing? (A) rain (B) lightning (C) greenhouse gas (D) H20 (E) SO2 (F) pollution (G) h2o (H) Dew

A:
G
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