Explanation
A Change Set is the deployment solution that a consultant should use to deploy permission sets granting access to objects and fields from one of its sandboxes to Production. A Change Set is a collection of metadata components that can be deployed from one Salesforce org to another. A Change Set can be used to deploy permission sets, which are sets of permissions and settings that grant users access to various tools and functions in Salesforce. Permission sets can be used to extend users' functional access without changing their profiles. Verified References: [Service Cloud Consultant Certification Guide & Tips], Change Sets Overview