Answer:
laughing at funny jokes helps to lift gloomy mood
Explanation:
when you are worried about something and you listen to something funny it will lift your mood.
The statement that summarizes the heading What Causes Happiness is Laughing at funny jokes helps to lift a gloomy mood.
Summary is a process in which a whole passage content is reduced by summarizing what was written there and this give the over all meaning of the whole paragraph or passage.
Therefore, The statement that summarizes the heading What Causes Happiness is Laughing at funny jokes helps to lift a gloomy mood.
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