Data loader, change sets, and Force.com IDE are tools that can be used for migrating functionality from a sandbox environment to a production environment. Data loader is a tool that can import, export, insert, update, delete, or upsert data in Salesforce. Change sets are outbound sets of metadata components that can be sent from one Salesforce org to another. Force.com IDE is an integrated development environment that allows you to edit, compile, test, and deploy metadata components using Eclipse. Verified References: Service Cloud Consultant Certification Guide & Tips, Data Loader Guide, Change Sets Overview, Force.com IDE Developer Guide