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: 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: a greenhouse is used to protect plants by keeping them warm, Fact2: With lots of rain and a warm climate, plants grow well., Question: What does a greenhouse help plants do? (A) Park cars (B) Start panicking (C) reproduce (D) growth (E) Bloom slower (F) adding heat (G) Regrows it (H) Grow well
H

Fact1: Running water is better able to dissolve oxygen and nutrients than standing water., Fact2: Large, warm rivers hold populations but few occur in cold running water., Question: What can better dissolve nutrients and oxygen? (A) lakes (B) SO2 (C) Raft (D) a solute (E) puddles (F) rivers (G) currents (H) lochs

F