Read the following context and choose the best option to answer the question.
Context: Pool owners who live in Los Angeles or Miami can splash around all year . But for those who live where winter is on the way , closing is a necessity . The process involves several steps , Mr. White said , some of which may be better left to a professional .
Question: What is the reason someone would need to close their pool ?
Options: 
- The pool is closed for ice skating .
 - The pool is closed for insurance only .
 - None of the above choices .
 - The pool is closed to increase it 's swimability .


None of the above choices .