What behavior indicates that an individual has successfully completed the grieving process after the death of a significant other?

Answer: Successful completion of a grieving process is indicated by an acceptance of loss and recovery of lost functions.

Explanation:

Grief comes with a number of reactions mostly peculiar to the individual experiencing it. Despite the peculiarity of response, there are common emotions such as denial, anger, depression, guilt and a decreased ability to perform usual tasks that a griefing person battles with.

The most effective response to grief is an acceptance and acknowledgement of the need to speak up about the emotions being experienced.

Recovery from grief does not happen all at once. It is a gradual process depending on the approach and state of mind of the individual experiencing it.

When recovery happens, lost functions are generally back to normal including investing in personal life, embracing new roles and ideas, optimism in career and a will to even get on with a new romantic relationship in due time.