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: cooking food requires adding heat energy, Fact2: Heat is essentially the source of energy., Question: Doing what to food requires adding the source of energy? (A) burning (B) burying (C) degrading (D) hydration (E) boiling (F) Light (G) sharing (H) cooking
[A]: H

[Q]: Fact1: Feathers help birds fly and provide insulation., Fact2: Some birds are flightless birds., Question: Why do the flightless have feathers? (A) layers of fat (B) Sublimation (C) it needs them (D) warm-blooded (E) Air conditioning (F) Radiation (G) Insulation (H) protect them
[A]: G

[Q]: Fact1: rocks interacting with wind over long periods of time causes weathering, Fact2: Weathered rock is called saprolite ., Question: Saprolite is created when what interacts with wind over long periods of time? (A) soils (B) trees (C) rocks (D) water (E) erosion (F) calcite (G) heat (H) oil
[A]:
C