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:
In one area, a large source of prey for eagles is rabbits. If the number of rabbits suddenly decreases, what effect will it most likely have on the eagles?  
 (A) Their numbers will increase. (B) Their numbers will decrease. (C) They will adapt new behaviors. (D) They will migrate to new locations.
answer:
B


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


question:
Which of the following is a cause of the ocean levels periodically rising and then falling?  
 (A) the slight tilt of the Moon (B) the force of gravity from the Moon (C) the convection within Earth's mantle (D) the revolution of Earth around the Sun
answer:

B