instruction:
You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
question:
Which of the following best describes a mineral?  
 (A) a solid natural material with a crystal structure (B) a material that was once living but has decayed (C) a liquid chemical used to make soil more fertile (D) a nutrient produced by plants that other organisms need
answer:
A


question:
Which form of energy is found in food?  
 (A) chemical (B) electrical (C) sound (D) mechanical
answer:
A


question:
Hookworms live inside the intestines of dogs. As the dog eats, the hookworms consume partially digested food. As a result of this nutrient diversion, the dog can become malnourished and weakened. Which best describes the relationship between the hookworms and the dog?  
 (A) a parasitic relationship (B) a mutualistic relationship (C) a predator-prey relationship (D) a producer-consumer relationship
answer:

A