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: Many consumers feed at more than one trophic level., Fact2: Consumers are heterotrophs that feed on tissues of other organisms., Question: What may eat other organisms at more than one trophic level? (A) barnacles (B) chickens (C) fur seals (D) humans (E) heterotrophs (F) mammals (G) animals (H) rabbit

A: E
****
Q: Fact1: Plasma cells are activated B cells that secrete antibodies., Fact2: Antibodies are produced by plasma cells., Question: antibodies are produced by activated B cells that do what? (A) Animal survival (B) killing insects (C) interact (D) secrete them (E) migrate (F) reproduce (G) competition (H) Allergies

A: D
****
Q: Fact1: Food consists of organic molecules that store energy in their chemical bonds., Fact2: Food is the ideal source of nutrients., Question: What consists of organic molecules that store energy in their chemical bonds? (A) source of genes (B) source of information (C) source of water (D) solid, liquid, gas (E) source of nutrients (F) vegetation (G) by making heat (H) Organic compounds

A:
E
****