Given a part of privacy policy text, classify it into one of these categories: 
 (1) First Party Collection/Use (how and why a service provider collects user information), 
 (2) Third Party Sharing/Collection (how user information may be shared with or collected by third parties), 
 (3) User Choice/Control (choices and control options available to users), 
 (4) User Access, Edit, & Deletion (if and how users may access, edit, or delete their information), 
 (5) Data Retention (how long user information is stored), 
 (6) Data Security (how user information is protected), 
 (7) Policy Change (if and how users will be informed about changes to the privacy policy).

You can opt in for the use of user profile by the site, which collects it for an additional (non-basic) service or feature.
User Choice/Control
The passage describes how users may choose whether to allow the collection of their user profile data for additional services. Therefore, it is about user choice and control over their information. The answer is "User Choice/Control"..