I'm sorry, but I am unable to browse the internet and therefore cannot provide specific sources or websites. However, I can offer some general guidance on how to find previous year SAT essay responses and explanations.

1. College Board Official Website:
- Begin by visiting the official website of the College Board, the organization responsible for administering the SAT.
- Explore the SAT section and look for resources related to the essay portion of the exam.
- College Board may provide sample essay prompts along with scoring criteria and explanations.

2. Prep Books and Study Guides:
- Many reputable publishers offer SAT prep books and study guides that include practice essay prompts and model responses.
- Look for books that provide detailed explanations for the essay responses, highlighting the strengths and weaknesses of each example.

3. Online Forums and Communities:
- Join online SAT forums and communities where students and tutors share their experiences and insights.
- Ask for recommendations on websites, blogs, or forums that provide explanations for previous year SAT essay responses.

4. Educational Websites:
- Explore educational websites that specialize in SAT preparation.
- Some websites may offer resources and explanations for previous year SAT essay responses.
- Be cautious and verify the credibility of the website before relying on the information provided.

Remember, it's important to practice writing essays in response to various prompts and to understand the criteria used for scoring. By analyzing and studying previous year essay responses, you can gain a better understanding of what makes a strong essay and how to effectively convey your ideas.