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: Insects may live in large colonies and have complex social behaviors., Fact2: Like other ants, the fire ant is a social insect., Question: What may live in large colonies? (A) animals (B) tigers (C) tardigrades (D) fire ants (E) bears (F) honeybees (G) orchids (H) graptolites
[A]: D

[Q]: Fact1: poisonous darts are used for defense by sea anemones, Fact2: Protection at the gateway is the best defense., Question: What are used as protection by sea anemones? (A) lamphreys (B) poisonous darts (C) tubular organ (D) feed on dead protists (E) coelenterates (F) islets of Langerhans (G) related organisms (H) moisturize their skin
[A]: B

[Q]: Fact1: Biodiversity generally increases from the poles to the equator., Fact2: Biodiversity and ecosystems are complex systems., Question: What generally increases from the poles to the equator? (A) kinetic energy (B) Energy. (C) warmth (D) voltage (E) sun's heat (F) temperature (G) complexity (H) sunlight
[A]:
G