In a longitudinal study, 66 percent of respondents were sad at first after the loss of a loved one but were happy and productive six months later. this demonstrates .

mourning            

Explanation:

Mourning: In psychology, the term "mourning" is described as a phenomenon that states an individual's sense of grief related to someones else's death. According to the researchers, those people who are considered as most affected by losing loved ones experience a specific grieving period that encompasses social withdrawal related to different events or situations.

According to the psychologists, mourning is high just after the time period when a person loses his or her loved ones as compared to a few months later.

In the question above, the given statement demonstrates "mourning".

answer: intercourse

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