Answer:70 menStep-by-step explanation:[tex]\frac{10}{3} = \frac{n}{21} \\3n = 210\\n = 210/3\\n = 70[/tex]
Answer:1. Sun: The most significant natural light source, providing daylight and essential for life on Earth.2. Moon: Reflects sunlight, illuminating the night sky.3. Stars: Emit light due to nuclear fusion processes in their cores.4. Auroras: Natural light displays in the Earth's sky, predominantly seen in high-latitude regions, caused by the collision of solar wind and magnetospheric charged particles with the high atmosphere.5. Lightning: A sudden electrostatic discharge during a thunderstorm, producing a bright flash of light.6. Bioluminescence: Light produced by living organisms, such as fireflies, certain fungi, and many marine organisms.7. Volcanic Eruptions: Can produce light from the intense heat and glowing lava.8. Meteors: When meteoroids enter the Earth's atmosphere, they heat up and emit light, creating a streak of light known as a shooting star.These natural light sources play crucial roles in various ecological and atmospheric processes.