Auto response rules work on which objects in Salesforce?

Auto-response rules are designed to automatically send email responses based on specific criteria whenever a new lead or case is created in Salesforce. This functionality primarily applies to the Lead and Case objects.

When a Lead is entered into the system, auto-response rules can be utilized to acknowledge receipt and provide initial information to the lead right away. Similarly, when a Case is created—often through customer inquiries or support requests—these rules help in promptly informing customers that their issue has been received and is being addressed.

Since auto-response rules are specific to managing immediate communication with incoming support queries and potential customers, their application to both Leads and Cases makes this choice the only correct answer. Other options incorrectly include objects that do not align with the intended function of auto-response rules, such as Accounts and Opportunities, which do not trigger these automatic responses.