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: Biodiversity increases the productivity and stability of ecosystems., Fact2: Ecotourism, on the other hand, can help to conserve biodiversity., Question: What increases the stability of ecosystems? (A) overpopulation (B) water consumption (C) loose soil (D) Quality of life (E) agriculture (F) deforestation (G) ecotourism (H) trees
[A]: G


[Q]: Fact1: building housing developments usually requires replacing animal habitats, Fact2: Habitat destruction is the primary cause of extinction or threat of extinction for all animals., Question: Building housing developments may cause  (A) eruptions (B) colder weather (C) disease (D) erosion (E) extinction (F) mutations (G) Destroy bridges (H) deforestation
[A]: E


[Q]: Fact1: Energy is passed up a food chain or web from lower to higher trophic levels., Fact2: Energy and carbon in organic compounds passed through food chain to herbivores and carnivores., Question: Carbon in organic compounds are passed through the food web from what? (A) it helps plants in growing (B) Burning fuel and air (C) members of their own species (D) people to dogs (E) herbivores to carnivores (F) carnivores to plants (G) passenger pigeons (H) predators to prey
[A]:
E