Final answer:
Link Analysis is the correct tool to determine which database design-related websites are most often linked to by other websites, as it evaluates the web interconnectivity and popularity.
Step-by-step explanation:
To find out which websites with content related to database design are most often linked to by other websites, you would use d. Link Analysis. Link analysis involves examining the links that point to a particular website, which is a critical component of Search Engine Optimization (SEO), but is distinct from web analytics, social media analytics, or SEO itself. By leveraging link analysis tools, you can identify which database-related websites are frequently referenced, potentially indicating their authority and popularity within the field.