The primary source of energy for Earth is the sun. Solar energy drives numerous processes essential for life, including photosynthesis, climate systems, and weather patterns. The sun's energy warms the planet, influences ocean currents and atmospheric conditions, and powers the water cycle. Solar energy is also crucial for generating renewable energy through technologies such as solar panels, harnessing the sun's rays for electricity. By providing light and heat, the sun is fundamental to maintaining life on Earth and sustaining ecosystems across the globe.