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: measuring the hardness of minerals requires scratching those materials, Fact2: To figure out the hardness of a mineral, the Moh's scale of hardness is used., Question: the Moh's scale of hardness is used by doing what to the materials (A) heating (B) tool extensions (C) protection (D) classified (E) scratching (F) as a base (G) how they move (H) Cladistics

A: E
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Q: Fact1: Climate is generally described in terms of temperature and moisture., Fact2: Humidity is moisture in the air., Question: Climate is generally described in terms of temperature and what else? (A) Ecology (B) Thermometer (C) calibrated (D) key element (E) Storms (F) Humidity (G) SI units (H) warmer air

A: F
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Q: Fact1: Some mollusks are nearly microscopic., Fact2: Mollusks are the dominant invertebrate., Question: what are sometimes nearly microscopic? (A) humans (B) magnification (C) barnacles (D) Veins and arteries. (E) gastropod shells (F) invertebrates (G) orchids (H) the sun

A:
F
****