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: erosion of soil has a negative impact on the environment, Fact2: Much of the landscape is scarred by severe soil erosion., Question: What is scarred by a negative impact on the environment? (A) mines (B) deforestation (C) skin (D) bushes (E) water (F) landscape (G) coastlines (H) clouds
[A]: F


[Q]: Fact1: seeing requires light, Fact2: Vision is our ability to see., Question: What is required for vision? (A) light (B) goggles (C) food (D) smell (E) hormones (F) Protein (G) color (H) hue
[A]: A


[Q]: Fact1: Macroevolution occurs over geologic time above the level of the species., Fact2: Geologic time lines are expressed in geologic eras and periods., Question: macroevolution occurs over what, above the level of the species? (A) atmosphere (B) years (C) growth (D) outer space (E) stress (F) Joules (G) humans (H) eras
[A]:
H