TASK DEFINITION: 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.
PROBLEM: What is a decomposer?  
 (A) a living thing that breaks down dead organisms (B) a living thing that makes its own food (C) an animal that eats live plants (D) an animal that hunts other animals

SOLUTION: A

PROBLEM: In which of these organs does most absorption of nutrients take place?  
 (A) liver (B) stomach (C) small intestine (D) large intestine

SOLUTION: C

PROBLEM: What is the correct explanation for why we have day and night on Earth?  
 (A) The Sun orbits around the Earth. (B) Earth orbits around the Sun. (C) Earth turns on its axis. (D) The Sun turns on its axis.

SOLUTION:
C