"Sunshine" refers to the light and warmth that comes from the Sun, the star at the center of our solar system. It is essential for life on Earth, providing energy for plants through the process of photosynthesis. Sunshine also influences weather patterns and helps regulate temperatures. In addition to its ecological importance, sunshine has psychological benefits for humans. Exposure to sunlight can boost mood and increase levels of serotonin, a neurotransmitter associated with feelings of happiness. However, too much sun can lead to skin damage, making it important to balance sun exposure with protective measures.