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.

[EX Q]: Which of the following forms of energy is released or absorbed in most chemical reactions?      
 (A) light energy (B) electrical energy (C) sound energy (D) heat energy
[EX A]: D

[EX Q]: Which property of air does a barometer measure?  
 (A) speed (B) pressure (C) humidity (D) temperature
[EX A]: B

[EX Q]: Growing thicker fur in the winter helps some animals to  
 (A) hide from danger (B) attract a mate (C) find food (D) keep warm
[EX A]:
D