instruction:
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").
question:
Fact1: mechanical weathering is when rocks are broken down by mechanical means, Fact2: Water is a mechanical weathering force., Question: What weathers rocks? (A) soil (B) streams (C) a delta (D) calcite (E) erosion (F) water (G) grass (H) the sun
answer:
F

question:
Fact1: volcanic ash in the atmosphere decreases the temperature by blocking the sun, Fact2: Supersaturation is inferred to be a common state for atmospheric haze particles., Question: What decreases the temperature by blocking the Sun? (A) cilia (B) the Sun (C) the wind (D) haze (E) ice (F) fat (G) rain (H) acids
answer:
D

question:
Fact1: Earth 's tilt on its rotating axis causes seasons to change, Fact2: Seasons are caused by the motion of the Earth around the Sun and the tilt of the Earth's axis., Question: what does axial tilt cause? (A) seasons (B) ligt (C) relocation (D) Movement (E) friction (F) erosion (G) heat (H) climate
answer:
A