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]: The energy that is stored in food originally comes from  
 (A) air (B) soil (C) sunlight (D) water
[A]: C


[Q]: 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.
[A]: B


[Q]: Clearing forests of trees and vegetation for human development can have major impacts on the ecosystem. Which would most likely occur after a forested area is cleared?  
 (A) an increase in habitat for wildlife (B) a decrease in food competition (C) an increase in soil erosion (D) a decrease in water runoff
[A]:
C