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.

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

A: A
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Q: Which of the following is an example of a behavioral adaptation?  
 (A) hooves of a horse (B) migration of birds (C) a spider web (D) a bee hive

A: B
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Q: An element is identified by  
 (A) its number of protons. (B) the atomic mass. (C) the type of charge. (D) its number of isotopes.

A:
A
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