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: Biomass is the total mass of organisms at a trophic level., Fact2: Each stage is a trophic level., Question: The total mass of organisms in an environmental stage is called what? (A) food pyramid (B) extinction (C) ecological pyramid (D) food chain (E) vegetation (F) food (G) ligt (H) biomass
[A]: H


[Q]: Fact1: if a living thing becomes too cold then that living thing will die, Fact2: Plants are also the oldest living things., Question: what dies if it becomes too cold? (A) plants (B) starfish (C) trout (D) planets (E) trees (F) ice (G) bears (H) clouds
[A]: A


[Q]: Fact1: fog is formed by water vapor condensing in the air, Fact2: Water vapor that condenses in the air near the ground is fog., Question: What is fog formed from? (A) atoms (B) antennas (C) watershred (D) scattered light (E) evaporation (F) condensed clouds (G) Wet weather (H) water vapor
[A]:
H