Option 2, "Building a self-driving car," is an example of a use case for AI Canvas. AI Canvas is a strategic planning tool specifically designed for artificial intelligence projects. Developing a self-driving car involves complex AI technologies and systems, making it a suitable use case for applying AI Canvas to align technical aspects with organizational goals, address stakeholders' concerns, and ensure strategic alignment throughout the project.

Options 1, 3, and 4 are not typical examples of AI projects that would directly benefit from AI Canvas. Designing a marketing campaign, creating a social media profile, and planning a company picnic involve tasks that may not heavily rely on the specialized considerations that AI Canvas addresses for AI projects.