Which of the following is a source of advice and guidance about personal finance?

Citizens Advice is recognized as a vital source of information and support for individuals seeking guidance on personal finance matters. This organization provides a wide range of services, including financial advice, budgeting tips, help with managing debt, and understanding consumer rights. Their trained advisors can assist with complex financial issues, making them a trusted resource for accurate and reliable information.

In contrast, the other options do not primarily focus on personal finance. The Department of Motor Vehicles primarily deals with vehicle registration and licensing, thus isn't suited for financial advice. A local grocery store may offer general consumer merchandise but lacks expertise in financial guidance. An online streaming service is focused on entertainment content and does not provide any financial advice or services. Therefore, Citizens Advice stands out as the appropriate choice for those in need of financial support and information.