The DFS object stores the DFS metadata for a domain-based namespace. The DFS object is created in Active Directory when you create a domain-based root, and Active Directory replicates the entire DFS object to all domain controllers in a domain.
Perhaps you have been diagnosed with major depression, and that's made you question why some people get depressed while others don't. Depression is an extremely complex disease. It occurs for a variety of reasons. Some people experience depression during a serious medical illness.
Anxiety is a feeling of unease, worry or fear. Everyone feels anxious at some point in their life, but for some people it can be an ongoing problem. A little bit of anxiety can be helpful; for example, feeling anxious before an exam might make you more alert and improve your performance.