Answer:

Seeing the sun can bring a feeling of happiness and joy to many people. However, the correct option in this case is option B: In the month of December. Let's explore why this is the correct answer.

1. Importance of the Sun:
The sun is an essential part of our lives. It provides light, warmth, and energy to the Earth. Its presence is crucial for the survival of all living beings. Therefore, seeing the sun can bring a sense of happiness and gratitude.

2. Psychological Effect:
Sunlight has a positive impact on our mental well-being. It stimulates the production of serotonin, a hormone that boosts mood and promotes happiness. Sunlight also helps regulate our sleep-wake cycle and can improve our overall mental health.

3. Seasonal Affective Disorder (SAD):
During the winter months, particularly in December, many people experience Seasonal Affective Disorder (SAD). SAD is a type of depression that occurs due to the lack of sunlight during the winter season. People with SAD often feel low, lethargic, and experience a loss of interest in activities. Seeing the sun in December can uplift their mood and provide relief from their symptoms.

4. Festive Season:
December is also a month of celebrations and festivities in many parts of the world. Christmas and New Year's Eve are widely celebrated during this time. The sight of the sun during these joyous occasions can enhance the festive spirit and bring a sense of joy and happiness to people.

5. Symbol of Hope:
In many cultures and religions, the sun is considered a symbol of hope, positivity, and new beginnings. Its presence during December, when the days are shorter and darker, can symbolize the promise of brighter days ahead and bring a feeling of optimism and happiness.

In conclusion, while seeing the sun can bring happiness at any time, the month of December holds a special significance due to its association with Seasonal Affective Disorder, festive celebrations, and the symbolic meaning of hope.