TASK DEFINITION: You are given a science question (hard-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: One example of a living thing is  
 (A) air (B) water (C) a rock (D) a worm

SOLUTION: D

PROBLEM: Stars are organized into patterns called constellations. One constellation is named Leo. Which statement best explains why Leo appears in different areas of the sky throughout the year?  
 (A) Earth revolves around the sun. (B) The sun revolves around Earth. (C) The constellations revolve around Earth. (D) Earth revolves around the constellations.

SOLUTION: A

PROBLEM: Why is it safer to look at the Moon than it is to look at the Sun?  
 (A) The Moon is less bright. (B) The Moon is closer to Earth. (C) The Moon shines mostly at night. (D) The Moon is full only once a month.

SOLUTION:
A

