What is required to access Salesforce data after an access token is granted?

The correct answer indicates that once an access token is granted, the web server can access Salesforce data directly using that token. This principle is based on OAuth 2.0, which is the authorization framework Salesforce uses for securing access to its APIs.

When an application requests access to Salesforce on behalf of a user, the authorization server provides an access token after the user has granted permission. This token serves as proof that the application has the right to access specific Salesforce resources without needing to authenticate the user again. As long as the token is valid and has not expired, it can be used directly by the web server to make API calls and retrieve or manipulate Salesforce data.

In this context, the other choices present alternatives that are not required under normal conditions. A web server does not need to log in again; it simply utilizes the valid access token. Likewise, verification of the user's password or re-approval of access is not necessary, as the access token itself provides authentication and authorization to access the resources without these additional steps. This efficient method enhances user experience by allowing seamless access to integrated services post-authentication.