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:
What kind of energy conversion occurs after a candle is lit?  
 (A) friction to electrical energy (B) light energy to heat energy (C) mass to kinetic energy (D) chemical energy to light energy
answer:
D


question:
Animals get energy for growth and repair from  
 (A) soil (B) food (C) water (D) air
answer:
B


question:
A student ties a string around a weight and swings the weight in a circle around her body. If the student represents the Sun and the weight represents Earth, what does the string represent?  
 (A) gravity (B) radiation (C) electricity (D) magnetism
answer:

A