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: Protozoa can be classified on the basis of how they move., Fact2: Paramecium are protozoa, single celled animals., Question: What is a way to categorize paramecium?  (A) the smell (B) coliform (C) the taste (D) canis lupus (E) how they move (F) the length (G) skin color (H) coelenterates
E

Fact1: Ants communicate with chemicals called pheromones., Fact2: Ants use receptors on their antennae to follow recruitment pheromone trails., Question: What do ants use to communicate? (A) nerves (B) heat energy (C) sound (D) binary code (E) light energy (F) Antennae. (G) megaphones (H) hand signals
F

Fact1: the looseness of soil has a positive impact on a plant 's roots' growth in that soil, Fact2: Roots are the veins and arteries of the plant., Question: The looseness of soil has a positive impact on what plant part and growth in that soil. (A) Roundworms (B) Top soil. (C) Earthworms (D) Veins and arteries. (E) agriculture (F) peachleaf willow (G) Plant silk leaves. (H) Leaves fallen on the ground

D