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").

Fact1: Mutations are essential for evolution to occur., Fact2: Mutations are changes in the DNA sequence., Question: What is essential for evolution to occur? (A) Changes in DNA sequences (B) Plant reproduction (C) Natural disasters (D) Gamma radiation (E) biological diversity (F) DNA sequences staying the same (G) the environment (H) that material's properties
A

Fact1: All animals are heterotrophs., Fact2: Heterotrophic bacteria derive energy from the breakdown of organic molecules., Question: What derive energy from the breakdown of organic molecules? (A) Most plants (B) hydrocarbons (C) potatoes (D) all stones (E) all water sources (F) all mountains (G) all animals (H) Generating heat
G

Fact1: Organisms cluster around hydrothermal vents in the ocean floor., Fact2: Hydrothermal vents are fissures in the ocean floor that leak hot, acidic water., Question: Where do organisms cluster on the ocean floor? (A) neutralized water (B) where they used to live (C) hot alkaline water (D) fissures of hot, acidic water (E) sedimentary rocks (F) fissures blasting cold water (G) at or near the margins (H) an area swollen with pus

D