A Full Sandbox is a type of sandbox that has a complete duplicate copy of the production org, including all the data and configuration. A Full Sandbox is useful for testing and development purposes, as it allows the developer to perform any changes or operations without affecting the production org. A Full Sandbox also supports performance testing, load testing, and staging1.
The other options are not correct because:
* A Developer Pro Sandbox is a type of sandbox that has a copy of the production org's configuration (metadata) and some data. A Developer Pro Sandbox is limited by storage space and can only hold up to
1 GB of data1.
* A Partial Copy Sandbox is a type of sandbox that has a copy of the production org's configuration and a sample of the data. A Partial Copy Sandbox is limited by storage space and can only hold up to 5 GB of data. The data is selected based on a sandbox template that defines the objects and records to include1.
* A Production org is not a duplicate copy of itself, but the original org where the live data and processes are stored. A Production org is not meant for testing or development purposes, as any changes or operations can affect the users and the business2.
References:
* 1: Sandbox Types and Templates
* 2: Salesforce Environments