In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
Q: Sentence: The sun and the moon appear to be about the same size in the sky because the moon is smaller in diameter and is closer to earth than the sun. Question: Which statement best explains why the Sun and the Moon appear to be about the same size in the sky?
A: 
The Moon is smaller in diameter and is closer to Earth than the Sun.