Wrong.
Change sets can be used to deploy metadata from one org to a related org : production to sandbox, sandbox to production or sandbox to sandbox.
A deployment requires inbound (received in the target org) and outbound (created in the source org) change sets.
To make sure that there’s no error, it is possible (but not mandatory) to validate an inbound change set before deployment.
A change sets limitation is that they can’t delete or rename components.
Link to Salesforce Help : Change Sets
Right.
Change sets can be used to deploy metadata from one org to a related org : production to sandbox, sandbox to production or sandbox to sandbox.
A deployment requires inbound (received in the target org) and outbound (created in the source org) change sets.
To make sure that there’s no error, it is possible (but not mandatory) to validate an inbound change set before deployment.
A change sets limitation is that they can’t delete or rename components.
Link to Salesforce Help : Change Sets