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: Evolution occurs in response to a change in the environment., Fact2: Extinction is a natural part or the process of evolution., Question: What happens to an environment to cause extinction?  (A) relocation (B) changes (C) rain (D) exposure (E) forces (F) wind (G) Pollution (H) discovery
answer:
B


question:
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
answer:
G


question:
Fact1: a greenhouse is used to protect plants by keeping them warm, Fact2: Then the planted seeds are placed in a warm greenhouse., Question: why are seeds put in a greenhouse? (A) to inhibit them (B) It remains dormant (C) by indirect light (D) lowered energy cost (E) evaporation (F) cooler air (G) it protects them (H) less moisture
answer:

G