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: Mutualism is a symbiotic relationship in which both species benefit., Fact2: Dogs and humans are symbiotic species., Question: what exists between dogs and humans? (A) mutualism (B) gravity (C) communication (D) antigens (E) several genes (F) space between (G) electrons (H) german shepherd

A: A
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Q: Fact1: Biomass is the total mass of organisms at a trophic level., Fact2: Producers make up the first trophic level, primary consumers the second, and so on., Question: What is the total mass of primary consumers (A) Plants (B) animals (C) food (D) Mountains (E) Biomass (F) decreases (G) all matter (H) Weight

A: E
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Q: Fact1: an animal needs to attract a mate to reproduce, Fact2: Sex is a complicated way for an organism to reproduce itself., Question: What does an animal need to attract a mate for? (A) food (B) sex (C) water (D) nest (E) male (F) transportation (G) eggs (H) life

A:
B
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