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").

[EX Q]: Fact1: natural disasters can cause animals to leave an environment, Fact2: Animal migration is mystery of nature., Question: Natural disasters can cause  (A) deforestation (B) kill them (C) Pollution (D) disease (E) deadly (F) erosion (G) migration (H) flooding
[EX A]: G

[EX Q]: Fact1: Animals can communicate with sounds, chemicals, or visual cues., Fact2: Unlike animal communication, properly human communication is abstract and linguistic in nature., Question: Which of the following do humans not use to communicate? (A) chemicals. (B) limb amputation (C) emissions (D) sweating (E) smoking pipes (F) dry conditions (G) visible energy (H) heat or cold
[EX A]: A

[EX Q]: Fact1: lakes are formed by precipitation and runoff, Fact2: Clouds form and precipitation occurs., Question: What are lakes formed by? (A) erosion (B) streams (C) desert (D) flooding (E) mice (F) rivers (G) stars (H) clouds
[EX A]:
H