Marisol was an avid runner but mostly ran for the social aspect of being with friends and to stay in shape. She surprised herself one day, however, when in the middle of a run, she became so engrossed with running that she ran an extra hour around the track. She described it as feeling free and wonderful. This is an example of

Explanation: Flow from a psychological perspective can be described as a mental state of mind which occurs when an individual becomes fully immersed, engrossed, absorbed or focused on a certain activity at a specific time solely for the love or pleasure derived from engaging in such activity. Flow could occur due to an individual's love for certain sporting activities, writing or other activities of interest.

In the scenario above, Marriott'free and wonderful feeling occurs as a result of her immersion in the activity she truly loves (running) to indulge in at that specific moment.